{"slug":"x402-agentindex-world-discover-5924d6","title":"Find MCP servers matching a need, ranked by semantic similarity over a curated s","host":"x402.agentindex.world","method":"POST","resource":"https://x402.agentindex.world/discover","category":"company","description":"Find MCP servers matching a need, ranked by semantic similarity over a curated snapshot of 10101 MCP servers. Returns name, endpoint, description, source registry and a 0-1 relevance per match. Paid POST: up to 25 matches. Try GET /discover/sample.","price_listed":0.001,"price_asked":0.001,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":954,"reported_calls_30d":2,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"q":"read a PDF and give me markdown"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"max_results":{"description":"Maximum number of servers to return (default 5).","maximum":25,"minimum":1,"type":"integer"},"min_similarity":{"description":"Minimum cosine similarity to include a result (default 0.30). Raise it for fewer, closer matches.","maximum":1,"minimum":0,"type":"number"},"q":{"description":"The need to match, in plain language - e.g. \"read a PDF and give me markdown\" or \"persistent knowledge graph\". Matched against 10101 MCP servers (official registry + carnet) by semantic similarity.","type":"string"}},"required":["q"]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"matches":{"description":"Number of servers above the threshold before the top-N cut.","type":"integer"},"min_similarity":{"description":"The similarity threshold applied.","type":"number"},"q":{"description":"The query that was matched."},"results":{"description":"Best-matching MCP servers, most relevant first.","items":{"properties":{"description":{"description":"What the server does, as observed.","type":"string"},"name":{"description":"Server name as observed.","type":"string"},"registry":{"description":"Registry or listing where it was seen."},"relevance":{"description":"Cosine similarity between the query and this server, 0 to 1.","type":"number"},"url":{"description":"Endpoint URL, when one was observed."}},"type":"object"},"type":"array"},"snapshot_date":{"description":"Date the underlying MCP snapshot was taken.","type":"string"},"snapshot_rows":{"description":"Number of MCP servers in the snapshot.","type":"integer"}},"required":["q","results"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-25","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.001,"price_match":true,"latency_ms":954,"error":null}],"description_full":"Find MCP servers matching a need, ranked by semantic similarity over a curated snapshot of 10101 MCP servers. Returns name, endpoint, description, source registry and a 0-1 relevance per match. Paid POST: up to 25 matches. Try GET /discover/sample.","last_updated":"2026-09-25T09:39:23.079Z","schemes":["exact"]}