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StableFace Reverse Face Search
x402
StableFace Reverse Face Search is a paid API for AI agents from stableface.dev, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-15).
Performs a reverse face search across the web to find every page containing a given face, powered by FaceCheck.id
Price / call$0.2
Success—
StatusUnknown
How this service works
Pay-per-request reverse face search powered by FaceCheck.id. Find every page on the web that contains a given face.
Output
A ranked list of web pages (up to the requested limit) where the face appears, each with a match confidence score from 0–100. Optionally includes base64-encoded face thumbnail crops. Results are sorted by score descending, filtered to only those meeting the minScore threshold.
Example use cases
Example prompt
“Search FaceCheck.id for every webpage containing the face in this photo — https://example.com/person.jpg — return up to 50 results and only include matches with a score of 85 or higher.”
Technical details
Endpoint
POSThttps://stableface.dev/api/facecheck/searchWhen to prefer
Use this endpoint when you need to find where a specific person's face appears across the public web, identify an unknown individual from a photo, or audit the online presence of a face. Prefer this over text-based image search when the query is a face rather than an object or scene. Best for identity research, due diligence, or verification use cases where facial biometrics are the search key rather than metadata or text.
Side effects
- No face detected in the provided image — returns empty results or error
- Image URL is not publicly accessible or returns a non-image content type
- Base64 data URL is malformed or too large
- Score threshold too high — filters out all results, returning empty array
- FaceCheck.id upstream unavailable — service error propagated
- Payment not attached or insufficient USDC — x402 payment required error
- Rate limit or quota exceeded on FaceCheck.id backend
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Image containing a face. Accepts a public http(s) URL or a data URL (data:image/...;base64,...) when you want to send bytes directly without hosting. |
| limit | integer | Maximum number of matches to return, ranked by score descending |
| minScore | number | Drop matches with score below this threshold. 85+ is typically a strong match. |
| testingMode | boolean | Run in FaceCheck testing mode. Only scans ~100k faces, no credits consumed, but results are not meaningful. Use for integration tests only. |
| includeThumbnails | boolean | Include a base64 data-URI thumbnail of each matched face. Off by default since thumbnails dominate response size and are rarely useful to agents. |
Tags
x402
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