# Webcite documentation

> Public HTTP API and MCP documentation for claim verification, source evidence, and document extraction.

API origin: https://api.webcite.co. Use the exact versioned path on each page. Authenticate with x-api-key. Keep keys on your server. Preserve unknown, absent, and failed outcomes.

## Machine-readable reference
- [OpenAPI](https://webcite.co/api-docs/openapi.json): Public operation and schema definitions.
- [Full documentation](https://webcite.co/llms-full.txt): All guides and references, including operation schemas.

## Get started
- [Webcite API documentation](https://webcite.co/api-docs/overview.md): Verify claims, inspect their sources, and extract evidence from documents.
- [Make your first API call](https://webcite.co/api-docs/quickstart.md): Create a key, verify one claim, and inspect the result.
- [Authentication](https://webcite.co/api-docs/authentication.md): Authenticate public API calls with an API key.
- [Credits and billing](https://webcite.co/api-docs/credits.md): Estimate a request's cost and interpret the billing information it returns.
- [API versions and scope](https://webcite.co/api-docs/versions.md): Use the version in each operation path, even when the product release is called V2.

## Verification
- [Verify a claim](https://webcite.co/api-docs/verify.md): Check a factual claim against sources and return citations, source stances, and a verdict.
- [Stream verification](https://webcite.co/api-docs/streaming.md): Receive verification events as work progresses, then wait for the final result and completion event.
- [Check quotes in a batch](https://webcite.co/api-docs/batch.md): Check whether each quote appears in the source you provide.
- [Record review feedback](https://webcite.co/api-docs/feedback.md): Record whether a reviewer accepts, rejects, or is unsure about a batch result.

## Sources & citations
- [Search sources](https://webcite.co/api-docs/search.md): Find sources for a query without requesting stance analysis or a verdict.
- [List citations](https://webcite.co/api-docs/citations.md): Retrieve previous verification records with pagination and optional thread filtering.
- [Get a citation](https://webcite.co/api-docs/citation.md): Retrieve a saved verification record by its ID.
- [Preview source evidence](https://webcite.co/api-docs/source-preview.md): Resolve a citation to its source and check whether the quoted passage can be found.

## Documents
- [Upload a file](https://webcite.co/api-docs/upload.md): Upload a file and keep the returned asset ID for extraction, preview, or document analysis.
- [Extract document text](https://webcite.co/api-docs/extract.md): Read an uploaded document as text with extraction status and source coverage.
- [Extract anchored chunks](https://webcite.co/api-docs/chunks.md): Split extracted content into chunks that retain page, sheet, or section locations.
- [Classify a document](https://webcite.co/api-docs/classify.md): Identify a document category and the document types it covers.
- [Check document coverage](https://webcite.co/api-docs/gaps.md): Compare the documents already filed with a category checklist.
- [Ask a document](https://webcite.co/api-docs/ask.md): Queue a question over document text and retrieve a checked answer when processing finishes.
- [Get a document answer](https://webcite.co/api-docs/ask-result.md): Poll a queued document question for its status and checked result.
- [Prepare OCR evidence](https://webcite.co/api-docs/ocr.md): Prepare a retained OCR representation for later quote matching.

## Numbers
- [Extract figures](https://webcite.co/api-docs/figures.md): Read document numbers as figures with units, reporting context, and source locations.
- [Compare figures](https://webcite.co/api-docs/conflicts.md): Recompute and compare figures you already extracted.
- [Analyze document figures](https://webcite.co/api-docs/analyze-document.md): Extract numbers from a spreadsheet or PDF, then recompute and compare them.
- [Verify numeric arithmetic](https://webcite.co/api-docs/numeric.md): Check a numeric claim against figures selected from retained source evidence.
- [Read accuracy measurements](https://webcite.co/api-docs/accuracy.md): Retrieve the numeric engine's measured results on its evaluation corpus.

## Guides & tools
- [Evidence and review](https://webcite.co/api-docs/evidence.md): Read source grounding, meaning, and confidence as separate parts of a result.
- [Compound claims](https://webcite.co/api-docs/decomposition.md): Ask Webcite to check the factual parts of a claim separately.
- [Response structure](https://webcite.co/api-docs/responses.md): Keep claims, citations, verdicts, and source locations together.
- [Work with documents](https://webcite.co/api-docs/document-workflows.md): Upload, extract, and retain the source location behind each piece of evidence.
- [Errors and rate limits](https://webcite.co/api-docs/errors.md): Handle failed requests without losing evidence or repeating paid work unnecessarily.
- [Connect an AI agent](https://webcite.co/api-docs/mcp.md): Use Webcite through MCP or give an agent the HTTP reference.
- [Read a verification stream](https://webcite.co/api-docs/streaming-guide.md): Keep complete events across network chunks and detect interrupted responses.

## Website
- [Documentation](https://webcite.co/api-docs): Browse the HTML documentation.
- [Pricing](https://webcite.co/#pricing): Current subscription plans.
- [Blog](https://webcite.co/blog): Tutorials and articles.