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FreshProof Evidence Pack
x402
FreshProof Evidence Pack is a paid API for AI agents from freshproof-api-mainnet.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Fetches up to five public web sources through a hardened retrieval pipeline and returns sanitized, prompt-injection-scanned, citation-ready evidence bundles with deterministic hashes and provenance metadata.
Price / call$0.005
Success—
StatusUnknown
How this service works
Fetches up to five public web sources through FreshProof’s hardened retrieval pipeline and returns sanitized, prompt-injection-scanned, citation-ready evidence with deterministic hashes and provenance metadata.
Output
Returns a structured evidence pack containing sanitized text excerpts from each source URL, citation-ready snippets, deterministic document hashes for auditability, provenance metadata (source labels, retrieval timestamps), resolved links, and prompt-injection scan results. Each source yields up to the configured number of evidence items, and the bundle supports downstream claim verification and citation workflows.
Example use cases
Multi-source fact-check for journalism
“I need to verify the claim 'Global renewable energy capacity doubled between 2015 and 2023' — can you pull evidence from https://iea.org/reports/renewables-2023, https://irena.org/statistics, and https://energy.gov/eere/renewable-energy against that claim with strict safety on and include citations?”
Research briefing with cited sources
“Put together an evidence pack from https://who.int/news-room/fact-sheets/detail/malaria, https://cdc.gov/malaria/about/index.html, and https://malariaconsortium.org/resources for the query 'current malaria prevention methods', with links included and up to 8 evidence items per source.”
Competitive intelligence with provenance
“Fetch and sanitize content from https://openai.com/research, https://anthropic.com/research, and https://deepmind.google/research for the query 'latest large language model benchmarks 2024', verify the claim 'GPT-4 outperforms competitors on MMLU', and return a hash-verified evidence bundle I can cite.”
Technical details
Endpoint
POSThttps://freshproof-api-mainnet.up.railway.app/v1/evidence-packWhen to prefer
Choose this endpoint when you need evidence from multiple web sources in a single call with safety guarantees — particularly when downstream tasks require deterministic hashes for auditability, prompt-injection protection, or citation-ready provenance metadata. It is preferable to single-URL retrieval endpoints when you have 2–5 known sources to cross-reference against one or more claims, and need the results bundled together with consistent formatting. Ideal for fact-checking pipelines, research agents, and compliance workflows where tamper-evident source attribution matters.
Side effects
- Source URL is unreachable or returns non-200 status — that source is skipped or returns an error entry
- Prompt injection detected in source content — content is flagged or sanitized, may be omitted in strictSafety mode
- Malformed or non-HTTP(S) URL provided — validation error returned
- More than 5 sources specified — request rejected with schema validation error
- Query or claim string exceeds 2000 characters — rejected with validation error
- Source returns non-text content (e.g. binary file) — may fail to extract evidence
- Payment of 0.005 USDC not completed via x402 — request blocked with 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| query | string | |
| claims | array | |
| options | object | |
| sources | array |
Tags
x402
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