---
title: "POST /routes/preview"
method: POST
path: "/routes/preview"
---

# POST /routes/preview

`POST /routes/preview`

## Request

- Base URL: `https://api.caveman.so/api/v1`
- URL: `https://api.caveman.so/api/v1/routes/preview`
- Auth: one of:
  - OAuth 2
    - Authorization code: `/api/v1/oauth/authorize`
    - Token URL: `/api/v1/oauth/token` scopes: `policy:draft`
  - HTTP bearer
  - API key in cookie `cave_access`
  - API key in cookie `__Secure-cave_identity.session_token`

POST /api/v1/routes/preview on the Caveman Cloud control plane. Requires the policy:draft scope. Exposed to autonomous agents as the preview_routing action of the caveman_project_setup tool (write access). Project settings for the bound project: semantic-cache shadowing and its options, pixel density, routing previews. Optimizations themselves are chosen per request (x-cave-optimize, x-cave-cache), not switched on here. Changing the semantic-cache threshold or TTL is refused server-side unless the caller holds policy:publish_s2_s3, which a scoped agent connection does not.

## Request body

- object
  - `endpoint` string
  - `model_routing` object
    - `allow_cross_provider` boolean
    - `alpha` number
    - `baseline_models` object
    - `candidate_allowlist` object
    - `data_residency` string[]
    - `disable_cross_provider` boolean
    - `max_cost_ratio` number
    - `max_error_delta` number
    - `max_p95_latency_delta_ms` integer
    - `max_quality_delta` number
    - `quality_floor` number
    - `route_capacity` object
    - `route_denylist` string[]
    - `router_version` string
  - `provider` string
  - `task_profile` object
    - `alpha` number
    - `candidate_allowlist` string[]
    - `candidate_denylist` string[]
    - `cross_provider` boolean
    - `data_residency` string[]
    - `max_cost_ratio` number
    - `max_error_delta` number
    - `max_p95_latency_delta_ms` integer
    - `quality_floor` number
  - `workflow_slug` string
  - `project_id` string, uuid, required

## 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)