Webcite API documentation
Verify claims, inspect their sources, and extract evidence from documents.
QuickstartMake a request and read the result.API referenceRequests, responses, and parameters.Document workflowsExtract text and keep its source.MCP and agentsConnect Webcite to an agent.
Make your first request
Create an API key, set it as WEBCITE_API_KEY on your server, and follow the quickstart. You can also test a claim in the playground.
The API origin is https://api.webcite.co. Operation paths include their version, such as /api/v1/verify. Do not add another /api prefix.
Choose a workflow
- Check a claim against the web: Verify a claim returns sources, stances, and a verdict.
- Check quotations against known sources: Batch quote matching reports whether the text can be found.
- Read a document: Upload, then extract text or anchored chunks.
- Check numbers: Compare figures or verify arithmetic with retained operands.
- Connect an agent: Use the MCP setup guide.
Read results before acting
A source match, a source stance, and a factual verdict answer different questions. Read the evidence guide before deciding what your application can publish. Keep partial, unknown, and failed states visible.
Use the format you need
Every topic has a Copy page action and a Markdown link. Agents can start with the documentation index, read the full documentation, or use the public OpenAPI file.