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The Formable API is organized around templates and signature requests for e-signing, with optional redline request endpoints for contract negotiation. It’s a REST API with predictable, resource-oriented URLs, JSON request and response bodies, and standard HTTP status codes.

Try it live

Every endpoint page includes a playground. Add your bearer token and send real requests from the docs.

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Base URL

All endpoints are served under /v1.

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Authentication

Every endpoint except the health check requires a Bearer token in the Authorization header. Create an API key in Settings, then pass it on each request. See Authentication for details. Prefer a typed client? Use an official SDK for Node.js, Python, PHP, Java, Go, Ruby, or .NET.

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Response format

Successful responses return JSON with a 200 status. Errors return a JSON object with a single error string:

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Status codes

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Resources

Templates

Upload documents and generate editor URLs.

Signature Requests

Send documents for e-signature and retrieve signed results.

Redlining

Create and manage collaborative redline negotiations.

Billing

Retrieve usage information.