---
title: "Submit outcome evidence"
method: POST
path: "/outcomes/{outcomeId}/evidence"
tags: ["Outcomes"]
---

# Submit outcome evidence

`POST /outcomes/{outcomeId}/evidence`

## Request

- Base URL: `https://api.darwin.so/api/v1`
- URL: `https://api.darwin.so/api/v1/outcomes/{outcomeId}/evidence`
- Auth: one of:
  - API key in header `x-api-key`
  - HTTP bearer

Adds idempotent, attributable evidence for verification. This operation never lets the caller assert or overwrite the canonical outcome.

## Path parameters

- `outcomeId` string, required

## Headers

- `Idempotency-Key` string, required

## Request body

- SubmitOutcomeEvidenceRequest
  - `evidenceDigest` string, required
  - `signedReference` string
  - `dealId` string

## Response `201`

The submitted evidence record.

- object
  - `evidence` OutcomeEvidence, required
    - `id` string, required
    - `outcomeId` string, required
    - `sourcePrincipalType` 'customer' | 'application' | 'provider' | 'counterparty', required
    - `goalId` string, nullable, required
    - `taskId` string, nullable: Deprecated compatibility alias for goalId.
    - `dealId` string, nullable
    - `digest` object, required
      - `algorithm` 'sha-256', required
      - `value` string, required
    - `signedReference` string, nullable
    - `verificationStatus` 'pending' | 'verified' | 'rejected', required
    - `disputeState` 'none' | 'open' | 'resolved', required
    - `submittedAt` string, date-time, required
    - `createdAt` string, date-time, required
    - `updatedAt` string, date-time, required

## Other responses

- `400`: The request was invalid.
- `401`: The API key or access token is missing, invalid, expired, or revoked.
- `403`: The principal does not have the required scope or resource access.
- `404`: The resource was not found for this principal.

---

[API](https://skmtc.dev/darwin/apis/darwin-api.md) · [All operations](https://skmtc.dev/darwin/apis/darwin-api/llms.txt) · [OpenAPI document](https://skmtc.dev/darwin/apis/darwin-api/revisions/56166fce7bfb?raw)