Agent Evidence API

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io.github.Thx93/agent-evidence-apiv0.1.9

Cited web evidence and fact checking for AI agents. $0.01 per call, no API key.

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https://agent-evidence.thx93.dev/mcp

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health Read-only

Check that the Agent Evidence API MCP server is reachable and report which service version is running. Free to call, takes no arguments or payment. Returns only {status, service, version} and exposes no secrets or infrastructure detail.

This tool takes no arguments.

Tools (4)

health

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {},
  "additionalProperties": false
}

preview_evidence

Free preview of the paid tool: give one question and one public URL and get back up to three cited excerpts with the source URL, retrieval time and content hash. No assessment and no verdict - that is what research_evidence adds, over up to five sources. Capped per day. Use this to judge whether the paid call is worth 0.01 USDC.

read-only

Argument	Type	Description
url*	string	One public source URL to retrieve and cite. The paid tool accepts up to five.
question*	string	The question or claim to gather web evidence for.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "question",
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "format": "uri",
      "description": "One public source URL to retrieve and cite. The paid tool accepts up to five."
    },
    "question": {
      "type": "string",
      "maxLength": 2000,
      "minLength": 8,
      "description": "The question or claim to gather web evidence for."
    }
  },
  "additionalProperties": false
}

research_evidence

Fetch public web sources and return structured, cited web evidence for a question or claim. Use this for source verification, claim verification, evidence extraction, and source-grounded research, or to compare sources. Returns source URLs, retrieval timestamps, short evidence excerpts, publisher and document metadata, and an explicit supported/contradicted/mixed/inconclusive assessment. Fresh web evidence is retrieved per request unless served from a bounded cache, and each source reports its actual retrieval time. Every excerpt returned is cited evidence tied to its source URL. No API key and no account: discovery is free, a call costs $0.01 in USDC on Base via x402, and nothing is charged when no source is retrieved.

read-only

Argument	Type	Description
mode	string	Reserved input. Only "evidence" is supported in version 0.1.0.
urls	array	Candidate public source URLs to retrieve and cite. Version 0.1.0 requires at least one such URL.
language	string	Preferred evidence language: "auto" or a BCP-47 tag such as "en".
question*	string	The question or claim to gather web evidence for.
max_sources	integer	Cap on the number of sources processed.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "question"
  ],
  "properties": {
    "mode": {
      "enum": [
        "evidence"
      ],
      "type": "string",
      "description": "Reserved input. Only \"evidence\" is supported in version 0.1.0."
    },
    "urls": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 25,
      "description": "Candidate public source URLs to retrieve and cite. Version 0.1.0 requires at least one such URL."
    },
    "language": {
      "type": "string",
      "maxLength": 35,
      "minLength": 1,
      "description": "Preferred evidence language: \"auto\" or a BCP-47 tag such as \"en\"."
    },
    "question": {
      "type": "string",
      "maxLength": 2000,
      "minLength": 1,
      "description": "The question or claim to gather web evidence for."
    },
    "max_sources": {
      "type": "integer",
      "maximum": 25,
      "description": "Cap on the number of sources processed.",
      "exclusiveMinimum": 0
    }
  },
  "additionalProperties": false
}

sample

Return one real, previously produced evidence package, free, so you can see exactly what a paid call returns before spending anything: a verdict, and for every source the URL, retrieval time, content hash and the cited excerpts. Takes no arguments and always returns the same package. The paid tool is research_evidence, which answers your own question.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {},
  "additionalProperties": false
}