for AI agents · MCP + REST

Verify a claim.
Get a verdict backed by a real quote.

POST one factual claim. We search the live web, extract the sources, adjudicate, and return supported / refuted / insufficient_evidence — with the exact verbatim passage the verdict came from. $0.02 per verified claim, billed only on success.

Get an API key See the response

Request

curl https://api.verify-api.dev/v1/verify \
  -H "Authorization: Bearer csk_live_..." \
  -H "Idempotency-Key: 018f4c8a-1234-4321-abcd-e3f6a7b8c9d0" \
  -d '{"claim":"The iPhone 15 launched on September 22, 2023."}'

Response

{
  "verdict": "supported",
  "confidence": 0.97,
  "source_url": "https://www.apple.com/newsroom/2023/09/...",
  "published_date": "2023-09-12",
  "exact_quote": "iPhone 15 and iPhone 15 Plus will be available … on Friday, September 22.",
  "cache": "miss",
  "billed_usd": 0.02
}

Verdicts, not documents

Everyone else returns pages. We return a decision — with a quote you can show your user.

Billed only on success

insufficient_evidence, out_of_scope, and malformed are free. Our incentives are aligned with yours.

Verbatim-quote gate

Every verdict includes text that appears character-for-character in the cited source. No hallucinated citations, by construction.

Works everywhere agents live

Native REST for programmatic callers, MCP server for Claude Desktop, Cursor, Windsurf, ChatGPT Desktop, and any MCP-capable host.

One line of pricing.

$0.02 per verified claim

Prepaid balance, top up any amount ≥ $5
Free: insufficient_evidence, out_of_scope, malformed
Semantic cache hits still count as billable if we return a verdict
No seats, no monthly minimum, no rate-limit tiers

Start with $5

Drop-in for MCP clients.

Add one block to your MCP config and the model gets a verify_claim tool alongside its other tools. Works with Claude Desktop, Cursor, Windsurf, VS Code Copilot agent mode, and any other MCP-capable host.

{
  "mcpServers": {
    "verifyapi": {
      "command": "npx",
      "args": ["-y", "@verifyapi/mcp"],
      "env": { "VERIFYAPI_API_KEY": "csk_live_..." }
    }
  }
}

Verify a claim.Get a verdict backed by a real quote.