Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
Agent Context API
Overview
Description from the maker (original English)
Agent-work MCP: free context preflight and page-read previews, paid x402 HTTP upgrades.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://agent-context-api-proxy.agent-context-proxy.workers.dev/mcpRun this in your terminal
claude mcp add --transport http agent-context-api https://agent-context-api-proxy.agent-context-proxy.workers.dev/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"agent-context-api": {
"url": "https://agent-context-api-proxy.agent-context-proxy.workers.dev/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"agent-context-api": {
"type": "http",
"url": "https://agent-context-api-proxy.agent-context-proxy.workers.dev/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://agent-context-api-proxy.agent-context-proxy.workers.dev/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account dacode-dev, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Otheri
- More stars than 0% of the other 32380 servers in this category
- Published to the registry more recently than 30% of the other 32380 servers in this category
- Basic checks equal to or better than 100% of the other 32380 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Agent Context API safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.7.4) reached the registry 2 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Dechonet MCP
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
by desktop-commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud★ 211Updated yesterday
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Dechonet MCP
by node-man
30 security tools for AI agents: phishing links, exposure maps, DNS, SSL, PQC, history, pivots.
Computer or cloudUpdated today
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README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Agent Context API
A small paid API for coding agents that need a deterministic context preflight before sending repository text to an LLM. It counts GPT-family tokens, applies an optional model-aware budget, and redacts likely credentials.
It also exposes managed data experiments. bounty-radar normalizes live agent-work listings and preserves the difference between a canonical escrow signal and an ordinary venue listing. payanagent-health produces a fresh liveness snapshot of the ranked PayanAgent catalog. base-market-pulse combines fresh public ETH, DEX, and Base-network signals. The source code is public, but the paid value is operated aggregation, source health, bounded probing, and timestamped results that a buyer does not have to run.
agent-work-brief is the decision-oriented bundle: it combines canonical escrowed work with catalog liveness, excludes ordinary unfunded listings, and classifies opportunities that require capital before an agent spends time evaluating them.
Why pay when the source is public?
Self-hosting is deliberately allowed. The paid convenience is the maintained run: polling changing upstreams, normalizing responses, detecting partial outages, enforcing bounded work, and serving a timestamped result from a ready endpoint. A buyer can fork the code, but then owns deployment, monitoring, rate-limit handling, schema drift, and repairs. There is no claim of exclusivity; the service must earn trust through freshness and reliable operation.
Local development
npm installnpm test X402_FACILITATOR=https://facilitator.openx402.ai npm start
The service listens on http://localhost:8787 by default. GET /health is free. POST /v1/context-preflight returns an x402 402 Payment Required response until the caller supplies a valid Base USDC payment.
For production Base mainnet operation, use a facilitator that advertises x402Version: 2, scheme: exact, and network: eip155:8453 at its /supported endpoint; the maintained deployment uses https://facilitator.openx402.ai. The public https://x402.org/facilitator endpoint is suitable for Base Sepolia testing, not this mainnet payout configuration. Always verify current facilitator support before changing deployments.
API example
curl -X POST http://localhost:8787/v1/context-preflight \-H 'content-type: application/json' \ -d '{"text":"const token = \"sk-example\";","model":"claude-sonnet","token_budget":1000}'
The default price is $0.005 per request. Set PAY_TO to change the public payout address, X402_FACILITATOR to select a compatible facilitator, and PUBLIC_HOSTS to provide a comma-separated allowlist of Worker/custom hostnames used in x402 resource URLs. Do not put private keys or facilitator credentials in this repository; the service does not need a signing key to receive payments.
Managed bounty radar
POST /v1/bounty-radar costs $0.01 through x402. Send filters such as:
{"include_unverified":false,"min_reward_usd":0,"limit":20}The response includes source health, deadlines, claim bonds, external-spend requirements, and a payment_evidence field. Only listings explicitly marked canonical and escrowed are labeled funded; other listings remain visible only when requested and are labeled unverified.
PayanAgent catalog health
POST /v1/payanagent-health costs $0.01 through x402. It accepts an optional limit from 1 to 25 and checks the ranked public catalog using only read-only HEAD requests (falling back to OPTIONS when required). HTTP 402 means that a live payment gate responded; the service never sends payment headers or calls paid routes. The response contains per-offer status, HTTP code, latency, summary counts, and generated_at.
Base market pulse
POST /v1/base-market-pulse costs $0.01 through x402 and accepts {}. The equivalent GET route exists for agent directories and simple HTTP clients. It reads Coinbase's public ETH/USD spot endpoint, DEX Screener's public Base WETH/USDC pair feed, and public Base JSON-RPC methods for the current block and gas price. It returns per-source health, timestamped values, and partial results when one source is unavailable. It is informational data only and does not trade or submit transactions.
POST /v1/agent-work-brief costs $0.03 and accepts optional min_reward_usd, limit, and health_limit filters. It is intended for agents deciding whether current work is worth pursuing; it makes no claims, payments, or downstream paid calls.
GET /.well-known/x402 (also available as /.well-known/x402.json) publishes the machine-readable service manifest, routes, prices, network, asset, and payout address. The manifest is generated from the request host so it remains correct when the zero-cost development tunnel rotates.
When the optional agent-tools hub gateway is enabled, it forwards settled requests to /hub/v1/base-market-pulse with a hub-issued X-Hub-Secret. That upstream path returns 404 without the secret and is separate from the direct x402 routes.
MCP integration
The repository also includes a local stdio MCP server for Cline and other MCP clients:
npm run start:mcpThe preflight_context tool provides a free local tier up to 12,000 characters. Larger inputs return the paid HTTP endpoint and its x402 price. Set PAID_ENDPOINT to the currently deployed endpoint when launching the MCP server. See llms-install.md for a copy-paste client configuration.
The same server is available as a hosted, stateless Streamable HTTP MCP endpoint at https://agent-context-api-proxy.agent-context-proxy.workers.dev/mcp and is described by server.json. It is published in the official MCP Registry for client and downstream-directory discovery. This hosted route is intended for clients that can discover remote MCP servers; local execution remains available for self-hosting and offline preflight work. glama.json identifies the GitHub maintainer for directory indexing and ownership.
Design notes
server.jscontains the Express app, x402 payment middleware, discovery metadata, and route wiring.mcp-core.jsdefines the shared MCP tool surface;mcp-server.jsruns it over stdio and/mcpruns it over Streamable HTTP.analysis.jscontains deterministic context analysis;bounty-radar.jscontains source normalization and evidence policy.payanagent-health.jscontains the bounded, read-only catalog collector and probe logic.market-pulse.jscontains the bounded public market/RPC collectors and partial-source health output.test/server.test.jscovers redaction, budgets, the health route, and funded/unfunded labeling;test/payanagent-health.test.jscovers health classification and the no-payment probe contract.- The API intentionally does not send submitted text to a third party; processing is local.
- This is an experiment. Revenue must be verified from settlement records, not inferred from 402 responses, requests, or directory listings.