For AI agents: visit https://docs.fourthline.com/v2.0/llms.txt for an index of all pages formatted in Markdown and endpoints in OpenAPI. Append .md to any documentation page URL to get its markdown version.

Guides Recipes API Reference Release Notes

API Reference

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Guides Recipes API Reference Release Notes

Fourthline APIs

About the APIs
- Migrate from API v1 to API v2
- Parameter glossary
Authentication
- Create access tokenpost
Workflow Setup
- Create workflowpost
- Create SDK sessionpost
Client Data & Documents
Workflow Execution
- Start workflowpost
Statuses
- Get workflow statusget
Reports
Qualified Electronic Signature
Test Outcome
- Configure outcomepost

Webhooks

Webhooks
- v2post

Confirm signature (External QTSP)

post

https://api.ext-sandbox.fourthline.com/v2/workflows/{workflowId}/signatures/confirm

External QTSP only (Namirial or InfoCert). Fourthline as the QTSP does not use OTP.

Use this endpoint to confirm signing using a one-time passcode (OTP).

Path Params

workflowId

uuid

required

The unique identifier of a signature already created.

Format: uuid

Example: 790f325a-48c9-4b82-bb53-c0ea128236f0

Body Params

The request containing the one-time password.

otp

string

required

One-time password from SMS. Sandbox testing: after Authorize signature, use Get signature OTP instead of a real SMS.

Headers

Authorization

string

required

Defaults to Bearer <access_token>

The access_token returned in your most recent Create access token response.

Cache-Control

string

Defaults to no-cache

To have the response validated by the origin server instead of reusing stored content, we strongly recommend including this parameter and setting it to no-cache.

Responses