---
title: "Get observed traffic evidence for registered build"
method: GET
path: "/projects/{projectId}/agent-builds/{buildSha256}/evidence"
---

# Get observed traffic evidence for registered build

`GET /projects/{projectId}/agent-builds/{buildSha256}/evidence`

## Request

- Base URL: `https://api.caveman.so/api/v1`
- URL: `https://api.caveman.so/api/v1/projects/{projectId}/agent-builds/{buildSha256}/evidence`
- Auth: one of:
  - OAuth 2
    - Authorization code: `/api/v1/oauth/authorize`
    - Token URL: `/api/v1/oauth/token` scopes: `trace:read_metadata`
  - HTTP bearer
  - API key in cookie `cave_access`
  - API key in cookie `__Secure-cave_identity.session_token`

Identity is client-declared and observed. verified_savings_usd remains zero.

## Query parameters

- `from` string, date-time
- `sample_data` boolean
- `to` string, date-time
- `window` string

## Response `200`

Content-blind observed evidence

- AgentBuildEvidence
  - `build_sha256` string, required
  - `plan_sha256` string, required
  - `registered` boolean, required
  - `requests` integer, required
  - `catalog_priced_complete_requests` integer, required: Requests with provider-complete usage and a public-catalog price. catalog_cost_usd covers only this subset.
  - `first_seen` string
  - `last_seen` string
  - `context_tokens` object, required
  - `transform_ids` string[], required
  - `transform_trace` string[], required
  - `catalog_cost_usd` number, required
  - `evidence_basis` 'observed_traffic_client_declared_identity', required
  - `attribution_basis` 'client_declared_build_plan_context', required
  - `verified_savings_usd` unknown, required

## Other responses

- `404`: Build not found in project
- `422`: Requested window exceeds raw-trace retention
- `503`: Retention policy could not be checked
- `4XX`: Structured failure. `error.code` is stable; `error.request_id` is echoed in the x-cave-request-id header.
- `5XX`: Structured failure. `error.code` is stable; `error.request_id` is echoed in the x-cave-request-id header.

---

[API](https://skmtc.dev/caveman/apis/caveman-cloud-api.md) - [All operations](https://skmtc.dev/caveman/apis/caveman-cloud-api/llms.txt) - [OpenAPI document](https://skmtc.dev/caveman/apis/caveman-cloud-api/revisions/508312d01cfc?raw)