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Flat-Rate LLM Image Describe
x402
Flat-Rate LLM Image Describe is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status healthy (last checked 2026-10-12, last successful call 2026-10-11).
Describes the contents of an image in about one second given an HTTPS URL or base64-encoded image, with an optional custom prompt
Price / call$0.005
Success100%
StatusHealthy
How this service works
Describes what is in an image in about one second: pass an https URL or base64 and ask anything about it, from a one-line caption to reading a sign. Pairs with the rest of the chain: describe an image, translate the description, then have it read aloud. You are only charged if the description is delivered. No API key, no account.
Output
A natural-language text answer describing the image contents, answering the provided prompt, or producing a caption — length controlled by max_tokens (16–512 tokens, default 128). The response is the AI-generated description string, delivered only when successful (pay-per-delivery model at $0.005 USDC per call).
Example use cases
Caption product photos automatically
“I've got this product image at https://example.com/products/widget.jpg — can you describe exactly what's shown in it, including colors and any visible text on the packaging?”
Read text from a photo of a sign
“Here's a photo of a sign I took at the conference — https://example.com/sign.jpg — can you read and transcribe whatever text is visible on it?”
Answer a visual question about an image
“I have this chart image encoded in base64 — can you look at it and tell me what the highest data point is? Here's the base64 string: [base64data]”
Technical details
Endpoint
GEThttps://flat-rate-llm.kikoribera03.workers.dev/v1/ai/image-describe?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, pay-per-use image description or visual question answering without setting up an API key or account. It is ideal for one-off image captioning, OCR-style text reading from photos, or chaining with translation and text-to-speech steps. At $0.005 USDC per call and ~1-second latency, it suits high-throughput pipelines or ad-hoc agent tasks where pre-paying for a subscription is impractical.
Side effects
- Invalid or unreachable image URL returns an error
- Base64 string that is malformed or not a valid image format causes a failure
- Neither url nor image parameter provided results in a missing-input error
- max_tokens outside the 16–512 range may be rejected or clamped
- Payment failure via x402 protocol means no charge and no result
- Image content that violates safety filters may be refused
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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