Machine-readable resources
| Resource | URL | Purpose |
|---|---|---|
| OpenAPI 3.1 | /openapi.json | Public API operations and response schemas. |
| Agent index | /llms.txt | High-signal site and developer links. |
| Sitemap | /sitemap.xml | Canonical indexable pages. |
| Markdown | Accept: text/markdown | Clean Markdown from the same public page URL. |
Public API scope
The 5xGPT Public Content API exposes read-only store display configuration and published articles. No authentication is required for the operations listed in the OpenAPI document. Fields may be extended as the website evolves.
GET /api/store— current public display configuration.GET /api/articles— published support and product-guide articles.GET /api/articles/{slug}— one published article.
Structured errors
API failures use application/json and include the stable fields errorCode, message, and resolution. The legacy error string remains available for existing site clients.
{
"error": "API endpoint not found",
"errorCode": "api_not_found",
"message": "API endpoint not found",
"resolution": "Use https://www.5xgpt.com/openapi.json to choose a documented endpoint."
}Markdown content negotiation
Public HTML pages also support text/markdown. Send Accept: text/markdown; negotiated responses include Vary: Accept. Unsupported representations receive 406 Not Acceptable.
Integration boundaries
5xGPT does not currently publish a general-purpose checkout API, webhook platform, SDK, or MCP server. Do not submit passwords, one-time verification codes, Session JSON, payment credentials, or unrelated sensitive data to the public content endpoints.
5xGPT is an independent third-party subscription assistance service and is not affiliated with, authorized by, or endorsed by OpenAI.
Support
For questions about the published resources, contact support@5xgpt.com.