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skills: {'id': 'discover-endpoints', 'name': 'Discover 2s endpoints', 'description': 'Given a natural-language description of a task, returns the best-matching 2s API endpoints — each with its id, HTTP path, method, group, description, and per-call USD price — so you can call the one that answers your question. Deterministic keyword + synonym ranking over the live 2s catalog (no LLM, zero upstream). The routing result is free; the endpoints it returns are pay-per-call via x402.', 'tags': ['discovery', 'routing', 'catalog', 'api', 'x402', 'search'], 'examples': ['check if a domain can be spoofed', 'is this CVE being exploited', 'screen a company for sanctions', 'decode a VIN', 'weather forecast for a ZIP code', 'validate an IBAN'], 'input_modes': ['text/plain'], 'output_modes': ['application/json', 'text/plain']}; conformance: fail

Transport
Auth
Cost

How to connect

MCP endpoint (streamable-http)
https://2s.io/a2a
JSON-RPC initialize probe
curl -X POST https://2s.io/a2a \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'
Homepage
https://2s.io/a2a
Listed at (chiark)
https://chiark.ai/agents/26aeaf95-d1db-462e-93d7-55887df16cd5