"An MCP server for reading emails" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Check an A2A agent before you delegate, or an MCP server's measured conduct. Free, no key.
Independent static checks for supported tag and alarm CSV import formats; no HMI or PLC access.
Contract-change authorization for AI agents: preflight a change to an API or MCP contract, get a signed decision, and verify the receipt offline. Only a granted change can proceed.
Audits any URL for HTTP 402 x402 V2 compliance, PAYMENT-REQUIRED headers, Bazaar schema, and MCP.
A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.
Deterministic release-compatibility preflight for OPC UA NodeSet2 XML.
Free *.pntr.dev dev subdomains — register subdomains, manage DNS and wildcard records, receive email on disposable inboxes, and capture HTTP requests for webhook debugging. OAuth sign-in; free tier.
Discovery registry for AI agents: 660+ APIs, MCP servers and CLIs, each health-checked every 6 hours with real requests — full initialize + tools/list handshakes for MCP, real calls for APIs — plus response-schema validation that catches responses which parse fine but are missing a required field.
Remote MCP that evaluates one public HTTPS URL for WebMCP readiness: intent, tools observed, what to add, what never to expose.
Signed declarations of HTTP API exchanges for agent handoffs. Free preparation and verification; receipt issuance costs 0.002 USDC via x402 on Base. Start and connect: https://datoka.dev/api. Signatures attest declared data, not independent truth.
GXEON services, prepaid packs from R$0.99, purchase planning, and agent buyer guidance.
Webhook, email, WebSocket and tunnel testing for AI agents: capture, wait, verify, replay.
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.
Independent health, price and history for x402/MPP endpoints. Metered over x402; free grade on web.
AI-callable tools for API mocking, testing, monitoring, security, and automation.
Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.
Find any agent service, and check it before you pay for it or rely on it.
Dated hands-on test results for 35 tested remote MCP connectors: does it work, how to sign in.
Evidence-cited machine-readable contracts for how agent platform APIs really behave
Inference, news, SEC facts, data checks, web extraction, mail, x402 checks and listing monitoring.
