# TruthFactor Signal API

- [TruthFactor Signal API](https://docs.truthfactor.ai/index.md): Identity corroboration — tell us what you know about a person, and we tell you which of it holds up.
- [Quickstart](https://docs.truthfactor.ai/quickstart.md): Submit a batch and poll for the result in two calls.
- [Authentication](https://docs.truthfactor.ai/essentials/authentication.md): Account-scoped bearer keys, how they're minted, and what a 401 means.
- [Signals](https://docs.truthfactor.ai/essentials/signals.md): The signal catalogue, required inputs, the premium tier, and what's coming.
- [The verdict model](https://docs.truthfactor.ai/essentials/verdicts.md): Each signal returns {trusted, confidence}. Why null is first-class and never means false.
- [Scoring and banding](https://docs.truthfactor.ai/essentials/scoring.md): How the score rolls up from the signals, the published table, band overrides, and worked examples.
- [Webhooks](https://docs.truthfactor.ai/essentials/webhooks.md): Receive completed batches by signed POST, and verify the signature.
- [Errors and limits](https://docs.truthfactor.ai/essentials/errors.md): Status codes, the error body, item-level outcomes, and rate limiting.
- [API reference](https://docs.truthfactor.ai/api-reference/introduction.md): The Signal API endpoints, rendered from the OpenAPI 3.1 spec.
- [Submit signals](https://docs.truthfactor.ai/api-reference/submit-signals.md): Submit a batch of inputs for background scoring.
- [Poll results](https://docs.truthfactor.ai/api-reference/poll-results.md): Poll a batch's status and results by request_id.

## OpenAPI Specs

- [openapi](/openapi.json)

## Optional

- [OpenAPI spec](https://api.truthfactor.ai/api/v1/openapi.json)
- [truthfactor.ai](https://truthfactor.ai)


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