---
title: "POST /projects/{projectId}/criteria"
method: POST
path: "/projects/{projectId}/criteria"
---

# POST /projects/{projectId}/criteria

`POST /projects/{projectId}/criteria`

## Request

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

POST /api/v1/projects/{projectId}/criteria on the Caveman Cloud control plane. Requires the eval:write scope. Exposed to autonomous agents as the create_criterion action of the caveman_evals_write tool (write access). Author versioned datasets, reusable evaluators and workbenches; create strict suites, ingest evidence, and run baselines. Evidence ingest supports dry_run — always dry-run first. Ask Caveman to draft quality criteria again within the drafting allowance, propose a criterion for a person to turn on, and hold the pull request that adds the Caveman check to CI. Track a criterion on a slice of traces in one step: from an agent it lands proposed, and a person turns it on. Queue units for review and label them (an agent's label is recorded as an agent's, never as human gold), and make a dataset from recorded traffic.

## Request body

- object
  - `name` string, required
  - `kind` 'question' | 'output_grader' | 'assertion' | 'code', required
  - `scope` 'span' | 'trace' | 'task' | 'row', required
  - `runtime` 'python' | 'javascript' | 'typescript'
  - `source` string
  - `min_score` number
  - `judge` object, nullable
    - `connection` string, required
    - `model_id` string
    - `temperature` number
  - `workload_id` string, uuid, nullable
  - `statement` string
  - `pass_def` string
  - `fail_def` string
  - `na_def` string
  - `answer` 'pass_fail' | 'score' | 'category' | 'pairwise' | 'answer_match'
  - `categories` string[]
  - `grader_type` string
  - `options` object
  - `input_mapping` object
  - `gating` boolean

## Response `2XX`

Successful response. Exact status depends on synchronous or durable delivery outcome.

## Other responses

- `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)