# ChatGPT — API Agent Score

> Score: 80/100 (Grade: A) | Domain: chatgpt.com | Rubric: 1.0.0 | Checked: July 29, 2026

ChatGPT scored 80/100 (A), classified "ai-ready".

[View full report](https://www.postman.com/ai/ai-ready-apis/company/chatgpt)
[All organizations](https://www.postman.com/ai/ai-ready-apis/llms.txt)

## Summary

- Overall: 80/100 (A)
- Classification: ai-ready

## Category Scores

- API Design: 97/100 (A+)
- Developer Experience: 61/100 (C)
- Agent Discovery: 85/100 (A)
- Agent Understanding: 81/100 (A)
- Agent Usability: 74/100 (B)

## Check Results

### API Design

- [pass] Machine-readable, versioned contract — Versioning declared (info.version="2.3.0") and url-versioning detected. Investigated: spec 100%, docs 100%.
- [pass] Auth declared & discoverable — Authentication required (global or on every operation). Investigated: spec 100%, docs 100%.
- [warn] Schema coverage & depth — 0/12 (0%) enum-like params are realized as constrained types (not bare strings). Investigated: sdk 86%, spec 67%.
- [pass] Security & governance hygiene — No credential-shaped strings detected in spec. Investigated: spec 100%, wellknown 50%.
- [pass] Example coverage — README is present and includes a runnable quickstart. Investigated: sdk 100%, spec 0%.

### Developer Experience

- [pass] Description completeness — 88% description completeness (target 90%+). Investigated: spec 100%, sdk 86%.
- [pass] Changelog published — Newest official SDK activity 0 day(s) ago. Investigated: sdk 100%, spec 0%, docs 0%.
- [fail] Self-service developer portal — No self-service signup detected: no signup link found on the homepage or docs, and no conventional signup path (/signup, /sign-up, /register, /get-started, /console/signup, /dashboard/signup, /try, /try-free, /free, /free-trial, /start, /start-free, /join, /create-account, /account/signup, /auth/signup, /users/sign_up) resolved. Investigated: docs 0%.
- [skip] Quickstart present — No surface produced evidence for this capability in this run.
- [skip] Code samples in docs — No surface produced evidence for this capability in this run.

### Agent Discovery

- [pass] llms.txt present, valid & comprehensive — llms.txt is present at /tmp/afsdks-git-T6e9rA/repo/docs/llms-full.txt, /tmp/afsdks-git-T6e9rA/repo/docs/llms.txt. An llms-full.txt is also present. Investigated: sdk 100%, docs 0%.
- [pass] Registry & SDK presence — Indexed on Context7 (websites/learn_chatgpt, 3324 snippets). Investigated: docs 100%, sdk 92%, cli 0%, mcp 0%, wellknown 0%.
- [fail] Crawlable / AEO — No sitemap discoverable via robots.txt or /sitemap.xml on the docs host. Investigated: wellknown 0%.
- [skip] Docs reachable, not hard auth-gated — No surface produced evidence for this capability in this run.

### Agent Understanding

- [pass] Machine-readable errors (RFC 9457) — Only 2 distinct 4xx/5xx codes documented (plus 0 "default" catch-all responses). Investigated: docs 100%, sdk 100%, spec 50%.
- [pass] Operation purpose clarity — 100% of operations have a clear summary + operationId an agent can select on. Investigated: spec 100%.
- [warn] Description consistency across surfaces — Mean pairwise description similarity across 2 surfaces (spec, sdk) is 6% (threshold 35% for full credit).
- [fail] Agent instructions file (AGENTS.md) — No AGENTS.md at the site root or /.well-known/. Investigated: wellknown 0%.
- [skip] Agent-navigable, token-efficient docs — No surface produced evidence for this capability in this run.
- [skip] Docs structured data — No surface produced evidence for this capability in this run.

### Agent Usability

- [pass] Idempotency documented — Built-in retry machinery is present (grep-derived). Investigated: sdk 100%, spec 0%, docs 0%.
- [pass] Pagination documented & consistent — Pagination params detected on 65 list endpoint(s). Investigated: spec 100%, docs 100%, sdk 89%.
- [pass] Sandbox separation — Sandbox environments are exposed (sandbox). Investigated: sdk 100%, spec 0%, docs 0%.
- [fail] Rate-limit signaling — No rate-limit response headers documented. Investigated: spec 0%, docs 0%.
- [fail] Runnable collection with test scripts — No public Postman workspace discovered for the org. Investigated: platform 0%.

## Executive Summary

ChatGPT's API program shows strong API design and documentation quality, but two areas demand immediate attention: partners and their agents have no self-service front door to discover, evaluate, and onboard without a sales conversation, and the program is invisible to AI agents that rely on machine-readable discovery signals like crawlable endpoints and structured instruction files. Prioritize building a self-service portal with full agent-readiness signals first, then close the gaps in runnable workflow context and operational transparency so partners can integrate confidently at speed.