capi2 Evidence Extraction

x402

capi2 Evidence Extraction is a paid API for AI agents from capi2-demand-tools.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Fetches a public web URL and extracts the most relevant text passages that support or answer a given claim, question, or evidence query.

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Paid x402 utilities and live intelligence for autonomous agents: hashing/encoding plus public web lookup, domain intelligence, API discovery audit, evidence extraction and x402 health.

Output

Returns a list of ranked text passages extracted from the given URL that are most semantically relevant to the query, each with a relevance score, along with the source URL and total passage count returned.

Example use cases

Fact-checking a news article

“Can you go to https://www.bbc.com/news/science-environment-12345678 and extract the 3 most relevant passages that back up the claim 'Arctic ice is shrinking faster than predicted'?”

Academic research evidence gathering

“I need you to fetch https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1234567/ and pull out up to 8 passages that address the question 'does intermittent fasting reduce insulin resistance in adults'?”

Competitive claim verification

“Check https://www.competitor.com/about and extract the top 5 passages that mention or support the claim 'we have the lowest fees in the market' — I want to see exactly what they're asserting.”

Technical details

Endpoint

POSThttps://capi2-demand-tools.onrender.com/v1/evidence/extract

When to prefer

Choose this endpoint when you need to extract semantically relevant text passages from a specific known public URL to support, verify, or investigate a claim or question — particularly for fact-checking, research evidence gathering, or auditing web content. Prefer it over general web search when you already have the source URL and need targeted, scored excerpts rather than broad discovery.

Side effects

URL is not publicly accessible or returns a non-200 status — extraction fails with an error
URL points to a paywalled, login-required, or bot-blocked page — no content extractable
Query string is too short (under 2 characters) or too long (over 1000 characters) — validation error
max_passages value is out of range (must be 1–10) — validation error
Page contains no parseable text (e.g. pure image, Flash, or heavily JavaScript-rendered) — empty or poor passages returned
Network timeout fetching the remote URL — request fails
Invalid URI format for the url field — schema validation error

Input

Schema · Request body

Field	Type	Description
url	string	Public source URL.
query	string	Claim, question or evidence terms.
max_passages	integer

Output

Schema · Response

{
  "type": "json",
  "example": {
    "passages": [
      {
        "text": "Example Domain",
        "score": 1
      }
    ],
    "source_url": "https://example.com",
    "passage_count": 1
  }
}

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How this service works

Paid x402 utilities and live intelligence for autonomous agents: hashing/encoding plus public web lookup, domain intelligence, API discovery audit, evidence extraction and x402 health.

Output

Example use cases

Fact-checking a news article

“Can you go to https://www.bbc.com/news/science-environment-12345678 and extract the 3 most relevant passages that back up the claim 'Arctic ice is shrinking faster than predicted'?”

Academic research evidence gathering

Competitive claim verification

“Check https://www.competitor.com/about and extract the top 5 passages that mention or support the claim 'we have the lowest fees in the market' — I want to see exactly what they're asserting.”

Technical details

Endpoint

POSThttps://capi2-demand-tools.onrender.com/v1/evidence/extract

When to prefer

Side effects

URL is not publicly accessible or returns a non-200 status — extraction fails with an error
URL points to a paywalled, login-required, or bot-blocked page — no content extractable
Query string is too short (under 2 characters) or too long (over 1000 characters) — validation error
max_passages value is out of range (must be 1–10) — validation error
Page contains no parseable text (e.g. pure image, Flash, or heavily JavaScript-rendered) — empty or poor passages returned
Network timeout fetching the remote URL — request fails
Invalid URI format for the url field — schema validation error

Input

Schema · Request body

Field	Type	Description
url	string	Public source URL.
query	string	Claim, question or evidence terms.
max_passages	integer

Output

Schema · Response

{
  "type": "json",
  "example": {
    "passages": [
      {
        "text": "Example Domain",
        "score": 1
      }
    ],
    "source_url": "https://example.com",
    "passage_count": 1
  }
}