Overview

Sealpost is an API-first e-signature service. You upload a PDF, create an envelope with recipients and field positions, and Sealpost takes it from there: each signer gets one email link, and when the last person signs you get back a sealed PDF and its record of events as JSON.

What you can call today

Area	Endpoints	Status
Connectivity and identity	GET /ping, GET /me	Live
API keys	create, list, rotate, revoke	Live
Request log	GET /requests	Live
Files	upload (multipart, URL, base64, presigned), status	Live
Envelopes	create a draft, read it back	Live
Sending, signing, sealing, webhooks		Coming next

Everything is in the API reference, generated from the same OpenAPI contract the service is built from. The raw contract is at /openapi.yaml.

The basics

• Base URL: https://api.sealpost.app/v1
• Authentication: Authorization: Bearer sk_test_… or sk_live_…. See Authentication and keys.
• Test mode: a test key never sends real email or bills anything. See Test mode.
• Errors: application/problem+json with a stable code. See Errors.
• Retries: send an Idempotency-Key when you create or rotate a key, upload a file, or create an envelope. See Requests, retries and limits.

Start with the Quickstart.