How to Humanize API Documentation After ChatGPT

API documentation is where ChatGPT looks most confident and fails most expensively: wrong auth scheme, fictional query params, and sample JSON that never came from your server.

Integrators do not read your overview essay. They copy the first curl. If it 401s, they open a ticket—or choose a competitor.

Humanizing without a working call produces polished docs that lie politely.

Related: humanize README (install path), best practices for humanizing, ethical AI checklist for OSS maintainers using assistants.

What AI API docs get wrong

Failure	Integrator pays
Bearer vs API-key header swapped	Auth loop
Example ID that does not exist	False debugging
Pagination params from another API	Silent wrong results
“Simply authenticate” with no steps	Abandonment
Identical OpenAPI boilerplate	Trust loss

Users adopt APIs with one successful request, not adjectives.

Auth + one call (lock this first)

Before any model, run and record:

# Replace with your real base URL and key flow
export API_KEY="test_key_from_dashboard"
curl -sS -X POST "https://api.example.com/v1/humanize" \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"Paste stiff prose here.","mode":"standard"}'

Checklist:

• Auth matches production (key header name, Bearer, OAuth step)
• Base URL is environment-correct (sandbox vs prod labeled)
• Response JSON pasted from terminal—not prettified by the model
• Status codes you saw: 200, 401, 429 documented honestly
• Rate limit number from your gateway, not a guess

Paste only verified curl and response into ChatGPT for section ordering. Ban new fields.

Minimum API doc skeleton

1. Overview (one sentence: what this API does)
2. Authentication (how to get a key; header format)
3. Quickstart (one call that returns 200)
4. Request reference (method, path, body schema)
5. Response reference (success + error shapes)
6. Errors (code → cause → fix)
7. Changelog link (version drift lives there)

Skip webhook essays until webhooks work in staging.

Section	Humanize?	Why
Paths, methods, field names	No	Contract
Auth header names	No	401 storms
Overview / concepts	Yes, one pass	AI loves vague “RESTful”
Error troubleshooting story	Yes, once	Cut “ensure you have” filler
Code blocks	No—re-run curl

Before and after (overview prose)

AI overview:

Our powerful RESTful API empowers developers to seamlessly integrate next-generation natural language capabilities into their applications at scale.

After your facts:

POST /v1/humanize accepts plain text and returns rewritten text plus a detection score. Authenticate with a Bearer token from the dashboard; sandbox keys hit api.sandbox.example.com.

Second version has a path, auth, and environment.

API docs vs README vs SDK quickstart

Artifact	Reader job	Lock first
README	Clone and run locally	Install commands
API reference	Integrate from any language	Auth + one curl
SDK quickstart	Copy-paste in one language	Published package version
OpenAPI YAML	Machine contract	Generated from code truth

If README and API docs disagree, integrators blame the API. Align quickstart paths with README install.

Where Human Writes helps

Paste overview, authentication narrative, and troubleshooting paragraphs into Human Writes once. Re-run every curl after. Put back endpoint strings exactly.

Do not humanize:

• JSON field names
• HTTP status tables
• OAuth redirect URLs

Workflow

1. Record terminal session of successful auth + call.
2. Write quickstart from that log.
3. Draft overview bullets yourself (what it does / does not do).
4. Optional: ChatGPT to reorder sections—no new endpoints.
5. One Human Writes pass on prose blocks only.
6. Run curl from a clean machine or CI doc check.
7. Legal review on data retention lines if you collect text.

For disclosure when docs describe AI features, see disclose AI on deliverables.

What not to do

• Publish GET /users when you only ship POST.
• Humanize until header names change.
• Paste live API keys in examples—use obvious placeholders.
• Copy Stripe’s doc layout with find-replace product name.
• Promise integrators detector-proof output in API marketing copy.

Bottom line

API docs win when auth works and one call returns real JSON. Human Writes polishes explanation after curl succeeds twice.

Paste overview prose on Human Writes after your quickstart returns 200.