# Generate social media captions with the PostEverywhere API

**Source:** https://posteverywhere.ai/docs/api/generate-caption

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# Generate social media captions with the PostEverywhere API

Generates 1-5 captions for a topic, styled per platform/tone/length.
Costs 1 AI credit per caption returned; credits are reserved
atomically before generation and refunded for captions that fail.
`402 insufficient_credits` when the plan's monthly credit budget
(plus bonus credits) cannot cover the request;
`502 ai_no_content` when the model returns nothing.
Unknown platform/tone/length values silently fall back to defaults.

Guide: [AI caption guide](https://posteverywhere.ai/docs/generate-caption)

Copy MarkdownCopy for LLMThis endpoint accepts a JSON request body. See the [ai guide](https://posteverywhere.ai/docs/generate-caption) for a worked example.

## Responses

- 200Captions generated
- 400
- 401
- 402
- 403
- 404
- 429
- 500
- 502AI model returned no content (credits refunded)

## More in AI

- [Generate an image](https://posteverywhere.ai/docs/api/generate-image)
[Generate an image →](https://posteverywhere.ai/docs/api/generate-image)[← All endpoints](https://posteverywhere.ai/docs/api/reference)