Find MCP servers matching a need, ranked by semantic similarity over a curated s
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.
Answeringour last check, 2026-09-25
1 of 1checks answered this week
954 msmedian answer time
$0.001listed price per call
$0.001price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://x402.agentindex.world/discover
| Category | Company and compliance |
|---|---|
| Provider host | x402.agentindex.world |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-25 | valid payment request | 402 | $0.001 | 954 ms |
Example input (from the provider)
{
"body": {
"q": "read a PDF and give me markdown"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}