Web Evidence

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io.github.impanyu/web-evidencev0.3.1

Paid claim verification with cited web evidence, source provenance, snapshots, and hashes.

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https://api.aisoup.net/web-evidence/mcp

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list_verification_tiers Read-only

List Web Evidence verification tools, prices, and research limits. This tool is free.

This tool takes no arguments.

Tools (5)

list_verification_tiers

List Web Evidence verification tools, prices, and research limits. This tool is free.

read-only

No arguments.

Input schema (JSON)

{
  "type": "object",
  "properties": {}
}

verify_claim

Standard verification with balanced evidence coverage. Costs $0.05 USDC on Base per call.

Argument	Type	Description
asOf	string	Optional YYYY-MM-DD date at which the claim should be evaluated.
claim*	string	The factual claim to verify.
language	string	Preferred response language or auto for automatic selection. Defaults to auto.
maxSources	integer	Maximum number of evidence sources to return, capped by the selected verification tier.
jurisdiction	string	Optional country, state, or legal jurisdiction that should frame the verification.
sourcePolicy	string	Source selection policy. Defaults to authoritative; official_only requires allowedDomains.
allowedDomains	array	Optional hostname allowlist without schemes or paths, for example openai.com.
blockedDomains	array	Optional hostname blocklist without schemes or paths.
freshnessHours	integer	Maximum preferred source age in hours. Defaults to 168 hours.
minimumSources	integer	Minimum number of sources requested. Defaults to 2 and cannot exceed maxSources.
includeConflicts	boolean	Whether to search for and report conflicting evidence. Defaults to true.

Input schema (JSON)

{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "claim"
  ],
  "properties": {
    "asOf": {
      "type": "string",
      "description": "Optional YYYY-MM-DD date at which the claim should be evaluated."
    },
    "claim": {
      "type": "string",
      "maxLength": 4000,
      "minLength": 3,
      "description": "The factual claim to verify."
    },
    "language": {
      "type": "string",
      "maxLength": 35,
      "minLength": 2,
      "description": "Preferred response language or auto for automatic selection. Defaults to auto."
    },
    "maxSources": {
      "type": "integer",
      "maximum": 20,
      "minimum": 1,
      "description": "Maximum number of evidence sources to return, capped by the selected verification tier."
    },
    "jurisdiction": {
      "type": "string",
      "maxLength": 100,
      "description": "Optional country, state, or legal jurisdiction that should frame the verification."
    },
    "sourcePolicy": {
      "enum": [
        "official_only",
        "authoritative",
        "open_web"
      ],
      "type": "string",
      "description": "Source selection policy. Defaults to authoritative; official_only requires allowedDomains."
    },
    "allowedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname allowlist without schemes or paths, for example openai.com."
    },
    "blockedDomains": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "maxItems": 100,
      "description": "Optional hostname blocklist without schemes or paths."
    },
    "freshnessHours": {
      "type": "integer",
      "maximum": 8760,
      "minimum": 1,
      "description": "Maximum preferred source age in hours. Defaults to 168 hours."
    },
    "minimumSources": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "Minimum number of sources requested. Defaults to 2 and cannot exceed maxSources."
    },
    "includeConflicts": {
      "type": "boolean",
      "description": "Whether to search for and report conflicting evidence. Defaults to true."
    }
  },
  "additionalProperties": false
}

verify_claim_deep

Deep verification for compound or contested claims using up to 15 cited sources. Costs $0.12 USDC on Base per call.

Argument	Type	Description
asOf	string	Optional YYYY-MM-DD date at which the claim should be evaluated.
claim*	string	The factual claim to verify.
language	string	Preferred response language or auto for automatic selection. Defaults to auto.
maxSources	integer	Maximum number of evidence sources to return, capped by the selected verification tier.
jurisdiction	string	Optional country, state, or legal jurisdiction that should frame the verification.
sourcePolicy	string	Source selection policy. Defaults to authoritative; official_only requires allowedDomains.
allowedDomains	array	Optional hostname allowlist without schemes or paths, for example openai.com.
blockedDomains	array	Optional hostname blocklist without schemes or paths.
freshnessHours	integer

verify_claim_quick

Quick verification for a narrow claim using up to 3 cited sources. Costs $0.02 USDC on Base per call.

Argument	Type	Description
asOf	string	Optional YYYY-MM-DD date at which the claim should be evaluated.
claim*	string	The factual claim to verify.
language	string	Preferred response language or auto for automatic selection. Defaults to auto.
maxSources	integer	Maximum number of evidence sources to return, capped by the selected verification tier.
jurisdiction	string	Optional country, state, or legal jurisdiction that should frame the verification.
sourcePolicy	string	Source selection policy. Defaults to authoritative; official_only requires allowedDomains.
allowedDomains	array	Optional hostname allowlist without schemes or paths, for example openai.com.
blockedDomains	array	Optional hostname blocklist without schemes or paths.
freshnessHours	integer

verify_claim_research

Research-grade verification with the largest search and evidence budget. Costs $0.25 USDC on Base per call.

Argument	Type	Description
asOf	string	Optional YYYY-MM-DD date at which the claim should be evaluated.
claim*	string	The factual claim to verify.
language	string	Preferred response language or auto for automatic selection. Defaults to auto.
maxSources	integer	Maximum number of evidence sources to return, capped by the selected verification tier.
jurisdiction	string	Optional country, state, or legal jurisdiction that should frame the verification.
sourcePolicy	string	Source selection policy. Defaults to authoritative; official_only requires allowedDomains.
allowedDomains	array	Optional hostname allowlist without schemes or paths, for example openai.com.
blockedDomains	array	Optional hostname blocklist without schemes or paths.
freshnessHours	integer

{ "type": "object", "$schema": "http://json-schema.org/draft-07/schema#", "required": [ "claim" ], "properties": { "asOf": { "type": "string", "description": "Optional YYYY-MM-DD date at which the claim should be evaluated." }, "claim": { "type": "string", "maxLength": 4000, "minLength": 3, "description": "The factual claim to verify." }, "language": { "type": "string", "maxLength": 35, "minLength": 2, "description": "Preferred response language or auto for automatic selection. Defaults to auto." }, "maxSources": { "type": "integer", "maximum": 20, "minimum": 1, "description": "Maximum number of evidence sources to return, capped by the selected verification tier." }, "jurisdiction": { "type": "string", "maxLength": 100, "description": "Optional country, state, or legal jurisdiction that should frame the verification." }, "sourcePolicy": { "enum": [ "official_only", "authoritative", "open_web" ], "type": "string", "description": "Source selection policy. Defaults to authoritative; official_only requires allowedDomains." }, "allowedDomains": { "type": "array", "items": { "type": "string" }, "maxItems": 100, "description": "Optional hostname allowlist without schemes or paths, for example openai.com." }, "blockedDomains": { "type": "array", "items": { "type": "string" }, "maxItems": 100, "description": "Optional hostname blocklist without schemes or paths." }, "freshnessHours": { "type": "integer", "maximum": 8760, "minimum": 1, "description": "Maximum preferred source age in hours. Defaults to 168 hours." }, "minimumSources": { "type": "integer", "maximum": 10, "minimum": 1, "description": "Minimum number of sources requested. Defaults to 2 and cannot exceed maxSources." }, "includeConflicts": { "type": "boolean", "description": "Whether to search for and report conflicting evidence. Defaults to true." } }, "additionalProperties": false }