Trajectory Eval API

The eval API from Trajectory — 11 operation(s) for eval.

Operations 12

POST /api/v1/eval/{run_id}/resume Resume Eval Route #
GET /api/v1/eval/options Get Eval Options Route #
GET /api/v1/eval/{run_id} Get Eval Run Route #
DELETE /api/v1/eval/{run_id} Delete Eval Run Route #
POST /api/v1/eval Start Eval Route #
POST /api/v1/eval/{run_id}/cancel Cancel Eval Route #
GET /api/v1/eval/{bench_id}/runs List Eval Runs Route #
GET /api/v1/eval/{run_id}/progress Get Eval Progress Route #
GET /api/v1/eval/{eval_run_id}/remaining-work Get Eval Remaining Work Route #
GET /api/v1/eval/{run_id}/trajectory-rewards Get Eval Trajectory Rewards Route #
GET /api/v1/eval/{run_id}/rollout-statistics Get Eval Rollout Statistics Route #
GET /api/v1/eval/{run_id}/token-usage Get Eval Token Usage Route #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/trajectory:trajectory-eval-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

trajectory-eval-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: Trajectory Eval API
  version: 0.1.0
  x-trajectory-api-version: '2026-10-14'
  description: This contract is API version 2026-10-14. The optional Trajectory-API-Version header pins it, and tmp-contract is accepted as an alias. Requests without the header get this version. Version 2026-10-07 and the pre-launch legacy response formats are retired.
tags:


# --- truncated at 32 KB (49 KB total) ---
# Full source: https://artifacts.apis.io/trajectory/openapi/trajectory-eval-api-openapi.yml