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PopNx MCPServidores MCP para quienes usan IA · en palabras sencillas

Tlacuilo

de mastercobeosversión 1.0.0i★ 0iSe ejecuta en la nube
Nombre en el registroio.github.mastercobeos/tlacuilo

Cómo instalar

What it does

35 pay-per-call tools for AI agents over x402 (USDC): web, security, markets, SEC, papers, Mexico

  • Connects Se ejecuta en la nube
  • Account or key No key needed
  • Category Ciberseguridad

Instalación

Elige la app de IA que usas y copia la configuración.

Pasó 5/5 revisiones · Lo que preguntas pasa por el servidor del autor (tlacuilo-jet.vercel.app) · ✓ Comandos revisados el 15 nov 2026

Primero: ¿qué IA usas?

Elige tu app y los pasos aparecen abajo.

Funciona con Claude · unos 2 min

Sin clave y sin instalar nada · Configúralo una vez en claude.ai o en la app de escritorio y úsalo en el chat · las cuentas gratis pueden añadir 1 · en Team/Enterprise lo añade un Owner

  1. Abre la página Connectors de Claude

    CustomizeConnectors

    CustomizeConnectors1Add2https://…3Add4
  2. Pulsa “Add” → “Custom” → “Web” y completa estos 2 campos

    Copia cada valor al campo con el mismo nombre en Claude y pulsa Continue

    Name · NombreTlacuilo
    Remote MCP server URL · Direcciónhttps://tlacuilo-jet.vercel.app/mcp

    Pulsa Continue en la pantalla de inicio de sesión que detectó Claude · en Authentication elige lo que indique el autor (Sign in now, Sign in when needed o No sign in) y pulsa Add

  3. Actívalo en un chat

    +ConnectorsTlacuilo

  4. Pruébalo

    Usa Tlacuilo y dime qué puedes hacer por mí; luego muéstrame una cosa

    ✓ Si Claude dice que está usando Tlacuilo o muestra una herramienta de Tlacuilo en la respuesta, ya está conectado

Nombres de menú comprobados con la ayuda de Anthropic el 11 nov 2026 · tu pantalla puede variar un poco según la versión

Funciona con ChatGPT según tu plan

MCP completo: ChatGPT Business, Enterprise o Edu en la web · Pro: conecta con permisos de lectura/obtención, así que las herramientas que cambian datos pueden no funcionar · Plus: no confirmado en la documentación; si ves una opción para añadir MCP propio en la página de plugins puedes probar · solo web

  1. Abre la página para añadir MCP en ChatGPT web

    Plugins+Add custom MCP server

    ChatGPTPlugins1+2https://…3Create4
  2. Escribe el nombre y la dirección

    Pon un nombre, pega la dirección en Connection, marca el aviso de riesgo y pulsa Create as a plugin

    Name · NombreTlacuilo
    Connection · Direcciónhttps://tlacuilo-jet.vercel.app/mcp
  3. Elige Tlacuilo en un chat

    Abre un chat nuevo y elige Tlacuilo en tus plugins antes de escribir

  4. Pruébalo

    Usa Tlacuilo y dime qué puedes hacer por mí; luego muéstrame una cosa

    ✓ Si ChatGPT dice que está usando Tlacuilo o muestra una herramienta de Tlacuilo en la respuesta, ya está conectado

Nombres de menú comprobados con la ayuda de OpenAI el 11 nov 2026 · tu pantalla puede variar un poco según la versión

Funciona con Claude Code · unos 2 min

Sin clave y sin instalar nada

  1. Abre la Terminal

    Mac: pulsa Command+Espacio y escribe Terminal · Windows: abre PowerShell

  2. Pega este comando y pulsa Enter

    claude mcp add --transport http --scope user tlacuilo https://tlacuilo-jet.vercel.app/mcp
  3. Escribe /mcp en Claude Code

    Deberías ver Tlacuilo en la lista como conectado

  4. Pruébalo

    Usa Tlacuilo y dime qué puedes hacer por mí; luego muéstrame una cosa

    ✓ Si Claude Code dice que está usando Tlacuilo o muestra una herramienta de Tlacuilo en la respuesta, ya está conectado

Nombres de menú comprobados con la ayuda de Anthropic el 11 nov 2026 · tu pantalla puede variar un poco según la versión

Funciona con Cursor · unos 2 min

Sin clave y sin instalar nada

  1. Pulsa este botón para abrir Cursor

    Abrir en Cursor

    Cursor te pedirá confirmar; pulsa Install

  2. Abre el chat de IA de Cursor en modo Agent

  3. Pruébalo

    Usa Tlacuilo y dime qué puedes hacer por mí; luego muéstrame una cosa

    ✓ Si Cursor dice que está usando Tlacuilo o muestra una herramienta de Tlacuilo en la respuesta, ya está conectado

Nombres de menú comprobados con la ayuda de Cursor el 11 nov 2026 · tu pantalla puede variar un poco según la versión

Funciona con VS Code · unos 2 min

Sin clave y sin instalar nada

  1. Pulsa este botón para abrir VS Code

    Abrir en VS Code

    VS Code te pedirá confirmar; pulsa Install

  2. Abre el chat de IA de VS Code en modo Agent

  3. Pruébalo

    Usa Tlacuilo y dime qué puedes hacer por mí; luego muéstrame una cosa

    ✓ Si VS Code dice que está usando Tlacuilo o muestra una herramienta de Tlacuilo en la respuesta, ya está conectado

Nombres de menú comprobados con la ayuda de VS Code el 11 nov 2026 · tu pantalla puede variar un poco según la versión

Otras apps que usan MCP, como Windsurf, Zed o Gemini CLI, añaden servidores de forma distinta. Míralo en la lista de apps

Ver todas las apps que usan MCP →

Dirección para apps que se conectan por la web

Direcciónhttps://tlacuilo-jet.vercel.app/mcp

La configuración JSON está en “Para desarrolladores”, abajo

¿Te atascaste? Pregunta a quien usa Tlacuilo💬 Conversación →
Para desarrolladores: comandos de Terminal y configuración JSON

Por la web

Claude Code

claude mcp add --transport http --scope user tlacuilo https://tlacuilo-jet.vercel.app/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "tlacuilo": {
      "url": "https://tlacuilo-jet.vercel.app/mcp"
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "tlacuilo": {
      "type": "http",
      "url": "https://tlacuilo-jet.vercel.app/mcp"
    }
  }
}

Esta configuración se genera a partir de la ficha del creador en el registro. Si el README dice otra cosa, sigue el README.

De un vistazo

Descargas por semanai
No está en npm/PyPI
Conexión
Se ejecuta en la nube
Transporte
streamable-http
Última versióni
1.0.0
Categoríai
Ciberseguridad
Publicado en el registroi
15 nov 2026
Último cambio de códigoi
15 nov 2026
Creador
mastercobeos
Estado en el registro
Activo

Qué apps pueden usarlo

Según cómo se conecta este servidor y la documentación de cada app, comprobado el 10 nov 2026.

Se conectan por internet en

ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast

Todas las apps, con ventajas y desventajas →

Qué puede hacer

Nombres y descripciones de las herramientas tal como los informó el servidor el 15 nov 2026. Los escribió el creador, no nosotros; los mostramos como texto sin formato.

  • catalog

    Free. Lists every tool with its price in USD, the accepted networks and how x402 payment works over MCP.

  • health

    Free. Payment network, facilitator and configured data sources.

  • web_read

    Read any public web page as clean, LLM-ready markdown: title, meta description, language and main content with navigation, ads and scripts removed. Follows redirects. Cheapest way to read a URL before deciding whether to pay for a full render. Price: $0.001 USDC per call (x402).

  • x402_find

    Which x402 API should I call for this task? Searches the Coinbase Bazaar catalog and ranks candidates by evidence of real use: distinct payers, repeat calls per payer, recency of payments and price. Returns up to 10 endpoints with URL, price, networks, example input and the reaso

  • token_verdict

    Token verdict for a Base contract or Solana mint: DEX market data (price, liquidity, 24h volume, buys/sells, pair age), security checks (honeypot, taxes, mint/owner powers, holder concentration via GoPlus; RugCheck risks and LP lock on Solana), red and green flags, a one-word ver

  • msg_box

    Creates a private mailbox for agent-to-agent messaging and returns its 22-character id plus a secret read key. Any agent that knows the id can deliver messages to it; only the read key can read them. The mailbox lives 30 days; messages are kept 7 days, newest first, up to 500. Op

  • msg_send

    Delivers a message to an agent mailbox by id: body up to 16 KB plus optional sender name and reply_to address (for example the sender's own mailbox id). Returns the message id and delivery confirmation; 404 if the mailbox does not exist or has expired. A public demo mailbox (demo

  • msg_inbox

    Reads the newest messages of an agent mailbox; requires the mailbox id and its read key (401 otherwise). Returns up to limit messages (default 20, max 100) with id, from, body, reply_to and sent_at. Reads are non-destructive unless ack=true, which removes the returned messages so

  • guard_injection

    Prompt-injection detector for text an agent is about to feed to a model: tool results, scraped pages or user input. Rules and heuristics only, no LLM, fast and deterministic. Returns risk 0-1, a clean/suspicious/malicious verdict, the categories found (instruction override, role

  • agents_readiness

    Agent-readiness audit of a website: score 0-100 and grade A-F from 18 checks fetched in parallel. Covers robots.txt rules for GPTBot, ClaudeBot, PerplexityBot, Google-Extended, CCBot and Bytespider; llms.txt; sitemap.xml; openapi.json, ai-plugin.json, MCP and x402 discovery files

  • dns

    Full DNS profile of a domain in one call: A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records, SPF and DMARC parsed (policy, all-mechanism, reporting address), DNSSEC validation flag, and inferred providers for DNS hosting, email and web hosting. Resolved over DNS-over-HTTPS with a

  • domain

    Domain registration record from the authoritative registry via RDAP (the successor to WHOIS): whether the domain is registered, registrar name and IANA ID, abuse contact, creation, last-change and expiration dates, days until expiry, EPP status codes, registry nameservers and DNS

  • web_tables

    Every HTML table on a public web page as structured JSON: title (caption or nearest heading), headers, rows as arrays and as records keyed by header, numeric columns detected and parsed to numbers, colspan and rowspan expanded, footnote markers removed. Selecting one table by ind

  • email_validate

    Email address check without sending mail: RFC-style syntax validation, domain deliverability from MX (or A/AAAA fallback) over DNS-over-HTTPS, mail exchangers, disposable-domain and free-provider detection, role-based local parts (info, support, noreply), typo suggestion for comm

  • polymarket_markets

    Polymarket prediction markets matching a text query, or the top markets by 24-hour volume when no query is given. Each market includes the question, every outcome with its current price (implied probability), the Yes probability, total and 24h volume, liquidity, end date, status

  • polymarket_market

    One Polymarket market by numeric id or slug: question, resolution description, outcomes with current prices, Yes probability, last trade, best bid and ask, 24h price change, total and 24h volume, liquidity, end date, status, parent event, tags and the Polymarket URL. Source: Poly

  • sec_filings

    SEC EDGAR filings for a US-listed company by ticker or CIK, newest first, optionally filtered by form type (10-K, 10-Q, 8-K, 4, S-1...). Returns company name, CIK, SIC code and industry, state and fiscal year end, and for each filing the form, filing date, period, accession numbe

  • sec_facts

    Reported financial values of a US-listed company from SEC XBRL company facts: the most recent annual (10-K) and quarterly (10-Q) figures for one concept such as revenue, net income, diluted EPS, total assets, cash or shares outstanding, with fiscal year, period dates, unit, form

  • federal_register_search

    US Federal Register documents (final rules, proposed rules, notices, presidential documents) matching a full-text query, newest first, with optional filters by agency, document type and publication date. Each document includes number, title, type, abstract, agencies, publication

  • papers_search

    Full-text search across 250M+ scholarly works in OpenAlex: title, authors, year, venue, type, citation count, open-access status with PDF link, reconstructed abstract (up to 1500 chars) and topics. Filters by publication date range and open access; sorted by relevance or citation

  • papers_cite

    Formatted citation for any DOI registered with Crossref or DataCite (journal articles, books, arXiv preprints, datasets): BibTeX entry plus a formatted reference in APA, MLA, Chicago author-date, IEEE, Harvard, Nature or AMA style. Resolves through DOI content negotiation with Cr

  • clinical_trials_search

    Clinical trial search on ClinicalTrials.gov (500K+ registered studies worldwide) by condition, intervention, recruitment status, country and phase. Each study includes NCT ID, title, status, phase, conditions, interventions with type, lead sponsor, enrollment, start and completio

  • deps_check

    Security and freshness check for one package version across npm, PyPI, Go, Maven, Cargo and NuGet: known vulnerabilities from OSV with CVE aliases, CVSS score and level, fixed versions and advisory URL; latest version, versions behind, publish date, licenses, deprecation flag and

  • deps_audit

    Vulnerability audit of up to 200 pinned dependencies in one call against the OSV database (npm, PyPI, Go, Maven, Cargo, NuGet). Accepts a package list or a package.json (dependencies and devDependencies, range prefixes stripped). Returns, per package, every known advisory with CV

  • rfc_validar

    Validates a Mexican RFC (tax ID): structure, person type (física/moral), embedded date and SAT check digit. Offline, no SAT call. Price: $0.002 USDC per call (x402).

  • curp_validar

    Validates a Mexican CURP: 18-character structure, check digit, and decodes sex, birth date and state of birth. Offline. Price: $0.002 USDC per call (x402).

  • cp

    Mexican postal code lookup from the national catalog of Correos de México: state, municipality, city and every neighborhood (colonia) with its settlement type. Price: $0.003 USDC per call (x402).

  • dias_habiles

    Mexican banking business days per the CNBV calendar: whether a date is a business day, the next and previous business day, and a date plus N business days. Price: $0.002 USDC per call (x402).

  • uma

    Current and historical UMA (Unidad de Medida y Actualización) values published by INEGI: daily, monthly and annual amounts with their effective dates. Price: $0.001 USDC per call (x402).

  • salario_minimo

    Mexican minimum wage set by CONASAMI: general daily rate and the Northern Border Free Zone rate for a given year, with monthly equivalents. Price: $0.001 USDC per call (x402).

  • iva

    Mexican VAT (IVA) and retention rates: general 16%, northern/southern border 8%, 0% and exempt categories, plus ISR and IVA retention rates for professional services and leases. Price: $0.001 USDC per call (x402).

  • banxico

    Latest value of an official Banco de México series: fix (USD/MXN FIX rate), udis, tiie28, tasa-objetivo, or any raw SIE series ID. Returns the date and value as published. Price: $0.003 USDC per call (x402).

  • sat_69b

    Checks an RFC against the SAT 69-B list of taxpayers with presumed non-existent operations (EFOS). Returns status (presunto, desvirtuado, definitivo, sentencia favorable), notice numbers and publication dates. Price: $0.02 USDC per call (x402).

  • sat_cfdi_verificar

    Verifies a CFDI 3.3/4.0 invoice against the SAT web service: whether it exists, is vigente or cancelado, its cancellation status and EFOS flag. Needs UUID, issuer RFC, receiver RFC, total and the last 8 characters of the seal. Price: $0.03 USDC per call (x402).

  • empresas_buscar

    Searches Mexican businesses in INEGI's DENUE directory (5M+ establishments) by name or keyword, optionally filtered by state. Returns name, legal name, activity, address, postal code, phone, email, website, size and coordinates. Price: $0.05 USDC per call (x402).

  • empresas_cerca

    Finds Mexican businesses near a coordinate using INEGI's DENUE: keyword plus latitude, longitude and radius up to 5,000 m. Same fields as the name search. Price: $0.05 USDC per call (x402).

  • empresas

    Full record of one Mexican business from INEGI's DENUE by establishment ID: identification, activity, address, contact, size, type and coordinates. Price: $0.02 USDC per call (x402).

Revisiones básicasi

Revisamos información que cualquiera puede ver; no hemos leído el código. Las revisiones que no aplican no se cuentan. · Revisado el 15 nov 2026

  • ✓ Superada

    El creador coincide con el repo

    El nombre en el registro se verificó con la cuenta de GitHub mastercobeos, dueña del repo

  • ✓ Superada

    Sigue en mantenimiento

    Último cambio de código: hoy

  • ✓ Superada

    Tiene licencia

    Usa MIT

  • ✓ Superada

    El endpoint responde

    Respondió en 165 ms (HTTP 200)

  • – No aplica

    Inicio de sesión con OAuth

    No hace falta iniciar sesión

  • ✓ Superada

    Sin instrucciones ocultas en las descripciones de herramientas

    Leímos 37 descripciones de herramientas y no encontramos instrucciones ocultas para la IA

Qué revisamos → · JSON

Creadores: pedir otra revisión o avisar de un dato erróneo

Conversación

Pregunta, comparte un consejo o avisa de que no funciona. Ordenado por lo que la gente marcó como útil.

Aún no hay publicaciones. Sé la primera persona en preguntar o compartir.

Lo publicado aquí lo escriben usuarios, no el equipo de PopNx.

Inicia sesión para publicar

Reseñas de usuarios

Aún no hay reseñas

Inicia sesión para escribir una reseña

Comparado con otros en Ciberseguridadi

  • Más estrellas que el 0% de los otros 1063 servidores de esta categoría
  • Publicado en el registro más recientemente que el 99% de los otros 1063 servidores de esta categoría
  • Revisiones básicas iguales o mejores que el 100% de los otros 1063 servidores de esta categoría

Comparado con todos los servidores activos de esta categoría en el registro. Las estrellas solo cuentan cuando quien lo publica es dueño del repo.

Preguntas frecuentes

¿Es seguro Tlacuilo?

Superó 5 de 5 revisiones básicas aplicables. No hemos leído el código. Antes de agregar una clave o un token, revisa qué acceso pide el servidor y usa una clave que tenga solo los permisos que necesitas.

¿Qué claves o códigos necesita?

El registro no indica ninguna clave obligatoria, aunque algunos servidores te piden iniciar sesión la primera vez que los usas.

¿Se ejecuta en mi computadora o en la nube?

Se ejecuta en la nube del creador. Te conectas por internet sin instalar nada, pero lo que envías pasa por los servidores del creador.

¿Sigue en mantenimiento?

El repo de GitHub cambió por última vez hoy, y la última versión (1.0.0) llegó al registro hoy.

¿Qué apps pueden usarlo?

Las apps compatibles con MCP, como Claude Desktop, Claude Code, Cursor y VS Code. Se conecta por URL, así que también sirve en apps que aceptan MCP remoto, como ChatGPT en la web (MCP completo en Business y superiores; Pro solo lectura).

¿Qué puedo usar en su lugar?

En la misma categoría: GitHits, Dependency Management MCP Server, Snyk MCP, Draugr, Spotdb

Alternativas parecidas

Misma categoría, otros creadores, comandos ya revisados. Primero los oficiales, luego por estrellas.

Cómo leer una tarjeta:↓ Descargas por semanai★ Estrellas de GitHubiTres pilares: reseñas · revisiones · usoiActualizado = fecha en que se publicó la última versión en el registroi

GitHits

Search public open-source code, documentation, metadata, vulnerabilities, changelogs, and examples.

de githits-comEn crecimiento↓ 3,8 mil/sem★ 136Actualizado hace 6 días

Computadora o nube✓ del servicio · githits.com

Dependency Management MCP Server

Sonatype component intelligence: versions, security analysis, and Trust Score recommendations

de sonatypeInicial★ 72Actualizado hace 12 meses

Se ejecuta en la nube✓ sonatype.com

Snyk MCP

Easily find and fix security issues in your applications leveraging Snyk platform capabilities.

de snykMuy usado↓ 762,1 mil/sem★ 62Actualizado hace 6 meses

Se ejecuta en tu computadora✓ del servicio · snyk.io

Draugr

Security scanning for AI agents: SAST, SCA, secrets, IaC, DAST, ranked by real risk.

de draugr-devInicial★ 29Actualizado hoy

Se ejecuta en tu computadora✓ del servicio · draugr.dev

Spotdb

Ephemeral data sandbox for AI workflows with guardrails and security

de aliengiraffeInicial★ 21Actualizado hace 13 meses

Se ejecuta en tu computadora✓ aliengiraffe.ai

README del creador

Abrir el README

Copiado tal cual del repo del creador. PopNx MCP no lo ha revisado ni lo respalda. Se quitaron HTML, imágenes y scripts. Los enlaces llevan fuera de este sitio.

Tlacuilo

Tools, public data and official Mexican data for AI agents, paid per call with x402.

Tlacuilo is an HTTP API (and an MCP server) with 35 tools that an agent can call without an account, an API key or a subscription. Every endpoint answers 402 Payment Required with its price; the agent pays a few cents in USDC on Base or Solana using the x402 protocol and gets the answer in the same request. Prices run from $0.001 to $0.05 per call.

  • Base URL: https://tlacuilo-jet.vercel.app/api/v1
  • Free machine-readable catalog: https://tlacuilo-jet.vercel.app/api/v1
  • MCP server (Streamable HTTP): https://tlacuilo-jet.vercel.app/mcp
  • OpenAPI: https://tlacuilo-jet.vercel.app/openapi.json · x402 discovery: https://tlacuilo-jet.vercel.app/.well-known/x402 · https://tlacuilo-jet.vercel.app/llms.txt
  • Listed in the Coinbase x402 Bazaar and on Agentic.Market.

This repository holds the documentation and runnable client examples (examples/). The server itself is not open source.

Why

Agents are good at calling tools and bad at signing up for things. x402 turns payment into an HTTP handshake: the server says what it costs, the client signs a USDC transfer, a facilitator settles it, and the response comes back. No dashboard, no keys to leak, no monthly minimum. Tlacuilo wraps sources that are useful to agents but awkward to reach (SEC EDGAR, OpenAlex, ClinicalTrials.gov, the Federal Register, Polymarket, OSV, RDAP, DNS, and official Mexican sources such as SAT, Banxico, INEGI and CONASAMI) behind one consistent, paid-per-call interface.

Quickstart

1. See the price (free)
curl -i "https://tlacuilo-jet.vercel.app/api/v1/banxico/fix"
HTTP/1.1 402 Payment Required

Content-Type: application/json Payment-Required: eyJ4NDAyVmVyc2lvbiI6MiwiZXJyb3IiOiJQYXltZW50IHJlcXVpcmVkIiwicmVzb3VyY2UiOnsi... Access-Control-Expose-Headers: PAYMENT-REQUIRED, PAYMENT-RESPONSE, X-PAYMENT-RESPONSE

The Payment-Required header is base64 JSON (x402 v2). Decoded, it contains the resource description, the accepts array with one entry per network (scheme exact, network as a CAIP-2 id, USDC asset, amount in atomic units, payTo address, timeout) and the Bazaar discovery block with the input schema and an output example:

curl -s -i "https://tlacuilo-jet.vercel.app/api/v1/banxico/fix" \

| grep -i '^payment-required:' | cut -d' ' -f2 | base64 -d | jq .

{

"x402Version": 2, "resource": { "url": "https://tlacuilo-jet.vercel.app/api/v1/banxico/fix", "description": "...", "serviceName": "Tlacuilo" }, "accepts": [ { "scheme": "exact", "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp", "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v", "amount": "3000", "payTo": "...", "maxTimeoutSeconds": 300 }, { "scheme": "exact", "network": "eip155:8453", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "3000", "payTo": "...", "maxTimeoutSeconds": 300 } ], "extensions": { "bazaar": { "info": { "input": { "type": "http", "method": "GET" }, "output": { "type": "json", "example": { } } } } } }

"amount": "3000" is 0.003 USDC (6 decimals). The catalog at /api/v1 lists the same prices in dollars.

2. Pay and get the answer (Node, @x402/fetch)
import { x402Client, wrapFetchWithPayment, decodePaymentResponseHeader } from "@x402/fetch";

import { registerExactSvmScheme } from "@x402/svm/exact/client"; import { createKeyPairSignerFromBytes } from "@solana/kit"; import { base58 } from "@scure/base";

const signer = await createKeyPairSignerFromBytes(base58.decode(process.env.SOLANA_SECRET_KEY)); const client = new x402Client(); registerExactSvmScheme(client, { signer }); // Solana mainnet, USDC const fetchWithPayment = wrapFetchWithPayment(fetch, client);

const res = await fetchWithPayment("https://tlacuilo-jet.vercel.app/api/v1/banxico/fix"); console.log(await res.json()); // { serie: "fix", fecha: "...", valor: ... }

const receipt = res.headers.get("PAYMENT-RESPONSE"); // settlement details, incl. tx signature if (receipt) console.log(decodePaymentResponseHeader(receipt));

npm i @x402/fetch @x402/svm @solana/kit @scure/base

To pay on Base instead, register the EVM scheme with a viem account:

import { ExactEvmScheme } from "@x402/evm/exact/client";

import { privateKeyToAccount } from "viem/accounts"; const client = new x402Client().register("eip155:*", new ExactEvmScheme(privateKeyToAccount(process.env.EVM_PRIVATE_KEY)));

The wrapped fetch handles the 402 round-trip transparently: it reads Payment-Required, picks a network you registered, signs, retries with the payment header and returns the paid response. A complete, runnable version that creates and funds a throwaway Solana wallet is in examples/pay.mjs. Python and other clients: see the x402 SDKs at https://github.com/x402-foundation/x402.

3. Use it as an MCP server

The MCP server at https://tlacuilo-jet.vercel.app/mcp (Streamable HTTP, no authentication) exposes the same 35 paid tools plus two free ones, catalog and health. Tool names are the HTTP paths with underscores (web_read, sec_filings, banxico, uma); path parameters become arguments. Payment travels inside MCP _meta (x402/payment and x402/payment-response) exactly as specified by @x402/mcp; a client wrapped with @x402/mcp pays automatically, with an optional approval hook per call.

Claude Code

claude mcp add --transport http tlacuilo https://tlacuilo-jet.vercel.app/mcp

Cursor (.cursor/mcp.json)

{

"mcpServers": { "tlacuilo": { "url": "https://tlacuilo-jet.vercel.app/mcp" } } }

Paying from your own MCP client (@x402/mcp)

import { createx402MCPClient } from "@x402/mcp";

import { ExactSvmScheme } from "@x402/svm/exact/client"; import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";

const client = createx402MCPClient({ name: "my-agent", version: "1.0.0", schemes: [{ network: "solana:*", client: new ExactSvmScheme(signer) }], // or "eip155:*" with ExactEvmScheme autoPayment: true, onPaymentRequested: ({ toolName, paymentRequired }) => BigInt(paymentRequired.accepts[0].amount) <= 50_000n, // approve calls up to 5 cents }); await client.connect(new StreamableHTTPClientTransport(new URL("https://tlacuilo-jet.vercel.app/mcp"))); const uma = await client.callTool("uma", { anio: "2026" });

npm i @x402/mcp @x402/svm @solana/kit @modelcontextprotocol/sdk

A tool call without payment returns an MCP tool result with isError: true and the PaymentRequired object in structuredContent; wrapped clients pay and retry. A runnable client that lists the tools, calls catalog and pays for one tool is in examples/mcp.mjs.

Tools

Prices are per call, in USD, settled in USDC. Every tool is documented with parameters and a runnable example in the free catalog at /api/v1.

Agent tools
ToolPriceWhat it does
GET /web/read$0.001Any public web page as clean, LLM-ready markdown (title, meta, language, main content; nav, ads and scripts removed).
GET /web/tables$0.003Every HTML table on a page as JSON (headers, rows, records, parsed numbers, colspan/rowspan expanded); one table also as CSV.
GET /x402/find$0.01Which x402 API should I call for this task? Searches the Bazaar and ranks by evidence of real use (distinct payers, repeat calls, recency, price).
GET /token/verdict$0.02Token verdict for a Base contract or Solana mint: DEX data, security checks (GoPlus, RugCheck), red/green flags, one-word verdict. Not trading advice.
POST /msg/box$0.005Create a private agent-to-agent mailbox (30-day life, 7-day message retention, up to 500 messages).
POST /msg/send$0.001Deliver a message (up to 16 KB) to a mailbox by id.
GET /msg/inbox$0.001Read the newest messages of a mailbox with its read key; ack=true consumes them.
GET /guard/injection$0.002Prompt-injection detector for text an agent is about to feed a model: risk 0–1, verdict, categories with evidence, sanitized copy. Rules only, no LLM, deterministic.
GET /agents/readiness$0.01Agent-readiness audit of a website: score 0–100 from 18 checks (robots rules for AI crawlers, llms.txt, sitemap, openapi.json, MCP/x402 discovery files, JSON-LD, Open Graph, no-JS content, HTTPS, response time) with recommendations.
Security and trust
ToolPriceWhat it does
GET /dns/:domain$0.003Full DNS profile: A, AAAA, CNAME, MX, NS, TXT, SOA, CAA; SPF and DMARC parsed; DNSSEC flag; inferred DNS, email and hosting providers.
GET /domain/:domain$0.005Registration record via RDAP: registrar, abuse contact, creation/expiry dates, EPP status, nameservers, DNSSEC delegation.
GET /email/validate$0.002Email check without sending mail: syntax, MX deliverability, disposable/free-provider detection, role accounts, typo suggestion, canonical form, 0–100 score.
GET /deps/check$0.005One package version across npm, PyPI, Go, Maven, Cargo, NuGet: OSV vulnerabilities with CVSS and fixed versions, latest version, versions behind, licenses, deprecation.
POST /deps/audit$0.02Audit up to 200 pinned dependencies (or a package.json) against OSV in one call, with a severity summary.
Public data worldwide
ToolPriceWhat it does
GET /polymarket/markets$0.005Polymarket markets matching a query, or the top markets by 24h volume, with outcome prices, volume, liquidity and end date.
GET /polymarket/market/:id$0.003One market by id or slug: outcomes, Yes probability, bid/ask, 24h change, volume, resolution text.
GET /sec/filings$0.005SEC EDGAR filings by ticker or CIK, filterable by form (10-K, 10-Q, 8-K, 4, S-1, DEF 14A, 13F-HR), with document URLs.
GET /sec/facts$0.005XBRL company facts: latest annual and quarterly values for revenue, net income, EPS, assets, cash, shares and any us-gaap/dei concept.
GET /federal-register/search$0.003US Federal Register documents (rules, proposed rules, notices, presidential documents) by text, agency, type and date.
GET /papers/search$0.005Full-text search over 250M+ scholarly works in OpenAlex with abstracts, citations, open-access PDF links and DOIs.
GET /papers/cite$0.002BibTeX plus a formatted reference (APA, MLA, Chicago, IEEE, Harvard, Nature, AMA) for any DOI.
GET /clinical-trials/search$0.005ClinicalTrials.gov studies by condition, intervention, status, country and phase, with sponsor, enrollment, dates and summary.
Mexico: basic official data
ToolPriceWhat it does
GET /rfc/validar$0.002Validate a Mexican RFC (tax id): structure, person type, embedded date, SAT check digit. Offline.
GET /curp/validar$0.002Validate a CURP and decode sex, birth date and state of birth. Offline.
GET /cp/:cp$0.003Postal code lookup from the national Correos de México catalog: state, municipality, city and every neighborhood.
GET /dias-habiles$0.002Banking business days per the CNBV calendar: is it a business day, next/previous, date plus N business days.
GET /uma$0.001Current and historical UMA values published by INEGI (daily, monthly, annual).
GET /salario-minimo$0.001Minimum wage set by CONASAMI: general and Northern Border Free Zone rates with monthly equivalents.
GET /iva$0.001VAT (IVA) and retention rates: 16 %, 8 % border, 0 % and exempt categories, ISR/IVA retentions.

| GET /banxico/:serie | $0.003 | Latest value of an official Banco de México series: fix, udis, tiie28,

Solo se muestra el principio; lee el resto en el repo