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369 Meter — pay-per-call APIs for agents (x402)

Official registry Games, sports and entertainment

Pay-per-call APIs for agents: text analysis, game facts, translation QA, hook scoring via x402.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http 369-meter-pay-per-call-apis-for-agents-x 'https://369yz.pythonanywhere.com/meter/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "369-meter-pay-per-call-apis-for-agents-x": {
            "type": "http",
            "url": "https://369yz.pythonanywhere.com/meter/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. 369 Meter — pay-per-call APIs for agents (x402)
  2. Services
  3. How to pay (x402)
  4. MCP
  5. Also listed via
  6. License

369 Meter — pay-per-call APIs for agents (x402)

Four pay-per-call APIs for agents, one rail: x402 (v1, "exact" scheme, USDC on Base), settling directly to the publisher's wallet. No accounts, no API keys, no checkout — call a route, get an HTTP 402 with payment requirements, pay, get the resource.

Live gateway: https://369yz.pythonanywhere.com/meter/ Health (free): https://369yz.pythonanywhere.com/meter/health PayTo (Base): 0xA0A1ff293EF2FF051121674c8eAAd69570b25e6c Facilitator: payai-public · every 402 declares the Bazaar discovery extension.

Services

REST routeMCP toolServicePrice/call
POST /v1/text/analyzetext_analyzeTextIntel — deterministic text analysis (counts, readability, script mix, keywords)$0.01
POST /v1/hook/scorehook_scoreHookScore — gaming headline/hook scored 0–100 against the 369 team's hook rules$0.01
POST /v1/translate/checktranslate_checkTranslationCheck — EN↔FA translation QA score 0–100$0.02
POST /v1/game/factsgame_factsGameFacts — live game metadata from RAWG (release, ratings, Metacritic, platforms, genres)$0.03

How to pay (x402)

# 1. Call without payment -> HTTP 402 + x402 payment requirements
curl -s -X POST https://369yz.pythonanywhere.com/meter/v1/text/analyze \
  -H 'Content-Type: application/json' -d '{"text":"your text"}'

# 2. Sign an EIP-3009 USDC authorization for the amount in
#    accepts[0].maxAmountRequired and retry with the X-PAYMENT header.
#    The resource is served only after the facilitator confirms settlement.

MCP

mcp_adapter.py (this repo, stdlib-only Python) exposes the same four services as MCP tools for directory discovery:

  • stdio: python3 mcp_adapter.py
  • streamable HTTP: mount application in any WSGI server (POST JSON-RPC).

tools/list and initialize are free. Because an MCP transport cannot carry an X-PAYMENT header, tools/call performs the real gateway call and returns the gateway's live 402 payment requirements as an MCP error result — it never serves an unpaid resource. Pay over the x402 rail on the REST route above.

Directory manifests in this repo: server.json (Official MCP Registry, name io.github.369369yz-collab/meter369), glama.json (Glama claim), openapi.json (the REST API spec, prices verified against the live 402s).

Also listed via

  • api.market — the same REST API (openapi.json); api.market auto-generates an MCP endpoint for listed APIs.
  • PayAPI Market — x402 directory (listed 2026-10-25; a $0.02 USDC canary payment from their verification has landed on-chain).

License

MIT — see LICENSE. The gateway service itself is operated by VeritasWorks; this repo publishes the adapter and the directory manifests.

Frequently asked questions

What is 369 Meter — pay-per-call APIs for agents (x402)?

Pay-per-call APIs for agents: text analysis, game facts, translation QA, hook scoring via x402.

How do I install 369 Meter — pay-per-call APIs for agents (x402)?

It runs as a remote server. In Claude Code: claude mcp add --transport http 369-meter-pay-per-call-apis-for-agents-x 'https://369yz.pythonanywhere.com/meter/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does 369 Meter — pay-per-call APIs for agents (x402) need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is 369 Meter — pay-per-call APIs for agents (x402) open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains 369 Meter — pay-per-call APIs for agents (x402)?

It is published by 369369yz-collab. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.