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PopNx MCPServidores MCP para quienes usan IA · explicados con palabras sencillas

FactStamp

de AlpineAIsihversión 0.1.4i★ –iSe ejecuta en la nube
Nombre en el registroau.com.alpineai/factstamp

Instalar

Resumen

Descripción del creador (original en inglés)

Verify a company, figure or citation before you rely on it. Card or crypto; signed receipt.

Los tres pilares de PopNx MCP

Estos tres nunca se combinan en una sola puntuación: las opiniones, las mediciones y la popularidad son cosas distintas.

Qué puedes hacer con él

Todavía no escribimos un resumen sencillo para este. Abajo están los datos que leímos del registro.

  • Conexión: Se ejecuta en la nube
  • Transporte: Streamable HTTP
  • Categoría: Otros

Instalación

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

Antes de instalar

Necesitas

¿Qué app usas?

Elige tu app arriba. La recordamos, así que la próxima vez el botón dirá “Instalar en …”.

Funciona en Claude para web, escritorio y móvil:

  1. Abre Settings → Connectors
  2. Presiona Add custom connector
  3. Pega la dirección de abajo y presiona Add
  4. Si te pide iniciar sesión, inicia sesión en el servicio del creador
SettingsConnectors1+ Add2https://…3
https://agents.factstamp.dev/mcp

Ejecuta esto en tu terminal

claude mcp add --transport http factstamp https://agents.factstamp.dev/mcp

Abrir en Cursor

O copia la configuración tú

Pégalo en .cursor/mcp.json de tu proyecto, o en ~/.cursor/mcp.json

{
  "mcpServers": {
    "factstamp": {
      "url": "https://agents.factstamp.dev/mcp"
    }
  }
}

Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.

Abrir en VS Code

O copia la configuración tú

Pégalo en .vscode/mcp.json de tu proyecto

{
  "servers": {
    "factstamp": {
      "type": "http",
      "url": "https://agents.factstamp.dev/mcp"
    }
  }
}

Tu navegador te pide permiso para abrir la app; luego la app muestra la configuración y te pide confirmar. Los valores de las claves quedan vacíos para que los completes tú.

ChatGPT solo se conecta a servidores en internet:

  1. Abre ChatGPT en la web → Settings → Connectors (Apps)
  2. Presiona Create o Add (en algunos planes primero hay que activar Developer mode en Advanced)
  3. Pega la dirección de abajo, ponle un nombre y guarda
  4. Si te pide iniciar sesión, inicia sesión en el servicio del creador
SettingsConnectors1+ Create2https://…3
https://agents.factstamp.dev/mcp

Los nombres de los menús pueden variar un poco según el plan y con el tiempo.

Tu elección se guarda en una cookie en este dispositivo; no necesitas cuenta.

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

Qué puede hacer

Nombres y descripciones de las herramientas tal como los informó el servidor el 7 nov 2026. Los escribió el creador, no nosotros; los mostramos como texto sin formato.

  • list_series

    Included. What this engine covers, the publisher and as-of date behind each series, and the no-guess rule.

  • route_claim

    Included. Shows which series a claim would be routed to, the value and date extracted, and the signals behind the score. Returns NO verdict — pay for check_figure when you want one.

  • list_card_packages

    Included. The one-off card packages as one machine-readable catalogue: the 11 products and their 13 prices in Australian dollars, the unit one payment buys for each SKU, what the package returns, and where the input is sent. One payment each, nothing metered, nothing subscribed.

  • buy_card_package

    Included. Opens a Stripe Checkout Session for one card package and returns its payment link and its session id. This tool charges nothing and produces no artefact: on the card rail the thing that taps is a human. The package's work runs only at its redeem path, after Stripe's own

  • check_figure

    Submit the dated figure you are about to act on. Returns verified, stale, contradicted or unknown, cited to the publisher's own series with its as-of date. Relevant wherever a number is going onto a page, deck or decision. Not advice. Comes with an Ed25519-signed receipt covering

  • check_entity

    Verify a legal entity: does this company exist, under which identifier and jurisdiction, and is its registration current? Cited to open primary registers (the GLEIF LEI index and US SEC EDGAR). Returns found, ambiguous, not_found or unknown; a near name match is never reported as

  • check_entity_file

    The entity file: ONE paid answer holding everything we hold about one company: the whole picture in ONE call rather than four separate facts stitched together, at the point of signing, onboarding, paying or acquiring a counterparty. It holds identity and standing, the registered

  • check_entity_file_il

    Israeli company lookup and company register check by company number (nine digits, with its own check digit) or by registered name, Hebrew or English: identity, corporation type, the register's own status and sub-status, description and stated purpose, incorporation date, governme

  • check_entity_file_ca

    Canadian company lookup and Canadian federal corporation register check by nine-digit Business Number (BN) only: corporation number, BN, governing legislation, every registered name with type, current flag and effective date, the register's own status, the registered address, the

  • check_sanctions

    Sanctions screening of a name, for whether a person or company is on a sanctions list — and which one. Reads OFAC SDN, the UN consolidated list, the EU Financial Sanctions File and the UK Sanctions List, and returns listed, mismatch, not_found or unknown. The answer names the lis

  • check_vat

    An EU VAT number check — VAT validity, and the VAT registration behind it. Reads the official VIES service (European Commission), keyless. Returns valid, invalid or unknown — an outage is NEVER reported as invalid — with the member state, the register's own request date, and the

  • verify_citation

    Says whether a citation can be repeated. Submit a DOI, an arXiv ID or a paper title: returns whether it exists, what it is (title, authors, year, container) and whether it has been retracted, cited to Crossref and arXiv. Optionally send what your document claims (title, authors,

  • verify_package

    Reports on a dependency at the point of installation. Submit a package and version plus its ecosystem: returns whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. An invented version returns not_found with the real versi

  • watch_add

    Watch ONE citation or ONE package version instead of checking it once. Send kind ('citation' or 'package') and the subject (a DOI, an arXiv ID or a title; or npm:express@4.18.2). The first check is answered immediately and signed, then re-checked daily for 30 days; every real cha

  • watch_portfolio

    Watch a whole list instead of one reference at a time: up to 25 citations or package versions re-checked every day for 30 days under one token. US$5 a portfolio — 20 cents a reference, under a cent a check — and the first check on every reference is answered and signed immediatel

  • verify_bulk

    Check a whole list in one call: a bibliography or a dependency manifest. Send items[] of {tool, input} or the citations[]/packages[] shorthand. Up to 12 items at a flat US$0.12 on this door; longer lists pay 0.016667 an item on the pack-funded HTTP door (POST /bulk, up to 25 item

  • check_document

    A whole document in one call: the claims that can be verified against a primary source, each answered by the door that owns it with its own signed receipt, plus one receipt over the document. Extraction is mechanical, so the claim list and the count are reproducible from your doc

  • audit_claims

    Audit what an agent believes about companies. Send up to 10 claims ({subject:{identifier|name|jurisdiction}, field, value}) and get, claim by claim: supported (the register says this), contradicted (it says something else, shown), stale (the register records it as FORMER, with th

Revisiones básicasi

Revisamos información que cualquiera puede ver; no hemos leído el código. Las revisiones que no aplican no se cuentan. · Revisado el 7 nov 2026

  • ✓ Superada

    El creador coincide con el repo

    El nombre en el registro se verificó con el dominio alpineai.com.au (el registro comprueba quién es dueño del dominio)

  • … Aún sin revisar

    Sigue en mantenimiento

    Todavía no hemos leído este repo en GitHub

  • … Aún sin revisar

    Tiene licencia

    Todavía no hemos leído este repo en GitHub

  • ✓ Superada

    El endpoint responde

    Respondió en 1086 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 18 descripciones de herramientas y no encontramos instrucciones ocultas para la IA

Comparado con otros en Otrosi

  • Más estrellas que el 0% de los otros 32742 servidores de esta categoría
  • Publicado en el registro más recientemente que el 78% de los otros 32742 servidores de esta categoría
  • Revisiones básicas iguales o mejores que el 100% de los otros 32742 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 FactStamp?

Superó 3 de 3 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 –, y la última versión (0.1.4) llegó al registro hace 10 días.

¿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 funcionan las apps que aceptan servidores MCP remotos, como ChatGPT en modo desarrollador.

¿Qué puedo usar en su lugar?

En la misma categoría: Spec Driven Development, Remote Desktop Commander, Asset Notation

Alternativas

Servidores de la misma categoría hechos por otros creadores, ordenados por estrellas.

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

Spec Driven Development

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MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Se ejecuta en tu computadora★ 440MITActualizado hace 14 meses
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Remote Desktop Commander

de desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

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Asset Notation

de assetnotation

Read and maintain an Asset Notation file on disk: net worth, holdings, valuations, CSV import.

Se ejecuta en tu computadoraActualizado hoy
Instalar

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.

FactStamp

Paid verification for agents, and a public record of every paid answer. Each call returns a cited, dated finding with a signed receipt you can verify offline, without asking us. Each settled call is written into a public log, and each day's root is stamped onto the Base blockchain whenever that day held a payment from someone other than us. When a check has to stay confidential there is a private option: a flat US$25 on top of the call price seals the request, so the world can see that a call happened and prove it later, but never learn what was asked. No model sits in the verdict path, and unknown is a first-class answer.

Live service: https://agents.factstamp.dev

What this repository is

The published machine interface of the FactStamp service, mirrored here so it can be read, diffed and cited without a wallet. Each row names the live route the copy came from, so any file here can be checked against the service in one request:

FileWhat it isLive source
openapi.jsonThe OpenAPI 3.1 description of every route.https://agents.factstamp.dev/openapi.json
llms.txtThe plain-language map of the service: what each tool costs, what it returns, what it refuses to claim.https://agents.factstamp.dev/llms.txt
coverage.jsonWhich registers are read, per jurisdiction, section by section, with the price of each door.https://agents.factstamp.dev/coverage.json
server.jsonThe MCP registry manifest — the entry submitted to the official registry, not a route the service serves.https://agents.factstamp.dev/.well-known/mcp.json (the live descriptor)

These are dated snapshots, not a live feed. Coverage and prices move as registers change, so a copy here can lag the service. When the two disagree, the live route wins — fetch it and believe that, not this. The files exist so a person or an agent without a wallet can read the interface, and so a reader can cite exactly what was published on a given day.

The service's private source is not published here.

Routes

RoutePurposeAccess
/mcpMCP endpoint — the tool surface agents call.—
/healthService status: name, network, judge and registry versions.open
/openapi.jsonMachine description of every route.open
/llms.txtThe service explained for readers.open
/coverage.jsonPer-jurisdiction coverage and prices.open
/samplesExample answers, so you can see the shape before paying.open
/ledger/rootThe public record: today's root, the last 30 daily roots, and each day's verdict.open
/ledger/zero-knowledgeThe private-request option: what it is, what it publishes, what it costs.open

Paid routes include /citation, /package, /check, /entity, /entity-file, /bulk, /document, /watch, /watch/portfolio, and /verify for receipt checking. Prices are published, per call, in the files above rather than in prose here.

Published prices at the time of writing

Taken from /health and /llms.txt as served:

  • figure door — US$0.05
  • entity door — US$0.10 to US$0.25, set by the depth of the country you ask about: US$0.10 for a country publishing 1–4 verifiable items, US$0.15 for 5–6, US$0.20 for 7–9, US$0.25 for Australia's fifteen. The quote is shown in the payment challenge, before any money moves, and a country whose register cannot answer today is not sold at all — it is refused with no price rather than charged for an "I don't know".
  • entity file — US$0.438119 (33p in the UK, at the dated rate carried on the answer and the receipt)
  • citation — US$0.02, package lookup — US$0.02
  • standing work: watch US$0.50, whole document in one call US$0.25, bulk at a flat US$0.12
  • company packages: US$2.00 and US$10.00, one-time, from the human page at /company

If a number here ever disagrees with llms.txt or openapi.json as served, the served file wins.

Receipts

Every paid answer carries a receipt signed with Ed25519 over the exact findings and the file's hash, so a third party can verify it offline against the published issuer and key document — no call back to us, and no trust in our uptime. The key document at /.well-known/factstamp-issuer.json states exactly which bytes the key identifier is derived from and carries a worked example, so the derivation can be reproduced in any hash tool. A receipt proves *that FactStamp said this, on this date*. It does not prove that the register itself is right, and nothing in this service claims it does.

The public record: the ledger, and what is stamped on Base

Every settled paid call, over HTTP and over MCP alike, appends one entry to a public log. The log is an RFC 6962 Merkle tree; each UTC day's log reduces to a single root, published at /ledger/root along with the last thirty days.

A day's root is written to the Base blockchain — one small data-only transaction, magic 0x46535401 followed by the 32-byte root — only when that day held at least one settlement paid by someone other than us. Our own test payments never anchor a day. The rule exists so that an anchor means something: a day is stamped because a stranger paid, not because we were busy.

Days already written (verifiable on Base, chain id 8453):

DayTransaction
2026-10-230x3bd942ae61c053aa7218ebfe44c25db2d9726412a67ec75073267cfb376d38f3
2026-10-250xa80b18f7d829fe535d86a700daa98f7f69f183877f158f1f0b2094dd2a94138f

A day that held no outside payment is published with the verdict that says so, rather than being quietly left blank. The honest limit: an anchor proves the root was committed publicly on the day the transaction landed, not on the day of the payment — the payment itself is already a public record, because it is a transfer on the same chain. The anchor adds our side of the story: that the answers we gave were fixed before anyone asked to see them.

Private requests: the sealed-entry option

By default a paid call's entry is published in full — the door, the price, the verdict, and the fact that the call happened. For a caller who needs the call itself to stay confidential there is a `zero_knowledge` option, declared on the request.

  • Price: US$25.00 in addition to the call's own price. A US$0.10 entity check declared private costs US$25.10. The payment challenge quotes the total before anything is paid.
  • What is published: an entry_id, the day, the price, the scheme (salted_commitment_v1) and the network. Nothing else.
  • What is sealed: the question, the answer and the verdict. The entry is committed to with a salted hash, so its existence and its position in the log are public while its contents are not.
  • What that buys: you can prove later that a specific call happened on a specific day — by revealing the salt to whoever needs it — without ever having published what you asked.

The private option is documented at /ledger/zero-knowledge, with its own root at /ledger/zero-knowledge/root and its entries at /ledger/zero-knowledge/entry/{entry_id}. It is an option on the paid doors, not a separate service.

What this service is not

  • Not a KYB provider, and not a substitute for one. It does not perform customer due diligence on anyone's behalf.
  • Not complete by assertion. Any register we did not consult is named on the answer as not consulted. A register we could not read returns unknown, never not found.
  • Not a fetcher of records you can already get at no cost. You are paying for the citation, the check and the receipt, not for the register's own data.

Issues

Corrections about a claim we make are welcome as issues here. If we have said something about a company, a number or a register that is wrong, that is the fastest way to tell us.

Pregunta a PopNx