"Resources for Coding in Python" matching MCP connectors:

Conformance checker for MCP servers. Free, no key, verdicts recomputable and re-measured daily.

Independent health, price and history for x402/MPP endpoints. Metered over x402; free grade on web.

Discover, pay for, execute, and publish APIs through Apiosk.

Experimental MCP server for current empirical verification of explicit public HTTPS endpoint claims.

Webhook capture bins for agents: get a URL, wait for webhooks, set replies, verify signatures.

SqueezeOS MCP for live machine discovery and x402-paid USDC APIs on Base.

Production proofs for breaking JSON Schema/MCP changes; UNKNOWN/NO_WITNESS_FOUND not compatible.

RationalBloksA

io.github.rationalbloks

Deploy production REST APIs from JSON schemas in seconds. Manage projects, schemas, and deployments.

Read-only ArcadeOps discovery for developer docs, OAuth, OpenAPI and synthetic sandbox.

chaos-index MCP — wraps StupidAPIs (requires X-API-Key)

npm MCP — wraps the npm Registry API (free, no auth)

mercury-number MCP — wraps StupidAPIs (requires X-API-Key)

always-seven MCP — wraps StupidAPIs (requires X-API-Key)

JMeterA

ai.jmeter.docs

Point Claude Code, Qwen Code, Cursor, or any MCP client at https://docs.jmeter.ai/api/mcp and your agent answers JMeter questions grounded in this documentation, with a source link for every answer. Free, no API key, no signup.

JSONPlaceholder MCP — wraps JSONPlaceholder fake REST API (free, no auth)

victorian-complaint MCP — wraps StupidAPIs (requires X-API-Key)

Ephemeral mailboxes and a mock OAuth IdP for testing email and auth flows — 39 API-driven tools covering mailboxes, mails, attachments, domains, teams, and mock identities.

yc-rejection MCP — wraps StupidAPIs (requires X-API-Key)

Anonymous webhook capture, inspection, waiting, and response configuration for AI agents.

Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.