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RelayStation Face Detection API
x402
RelayStation Face Detection API is a paid API for AI agents from api.relaystation.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Detects faces in an image and returns attributes including age range, emotions, pose, and facial landmarks using AWS Rekognition.
Price / call$0.01
Success—
StatusUnknown
How this service works
$0.005/image. Detect faces with attributes — age range, emotions, pose, landmarks (Rekognition). 1¢ x402 min; remainder auto-credits — relaystation.ai/penny
Output
Returns a list of detected faces, each with a bounding box, estimated age range (min/max), detected emotions with confidence scores, facial pose (pitch, roll, yaw), and facial landmark coordinates (eyes, nose, mouth, etc.).
Example use cases
Emotion detection for UX research
“I have a photo from our user testing session — can you detect the faces in it and tell me what emotions each person appears to be expressing, along with confidence scores?”
Age range estimation for audience analytics
“Run face detection on this crowd photo and give me the age ranges and emotions for every face you find — I want to understand our audience demographics.”
Facial pose analysis for photo quality check
“Can you analyze this profile photo and tell me the facial pose, landmarks, and whether the face is well-positioned — I need to know if it's suitable for ID verification?”
Technical details
Endpoint
POSThttps://api.relaystation.ai/v1/vision/detect-facesWhen to prefer
Choose this endpoint when you need structured facial attribute data (age, emotion, pose, landmarks) from AWS Rekognition at a low per-image cost of $0.005. Prefer it over generic object detection when the specific need is face-centric analysis. It's ideal for agents automating photo moderation, audience analytics, identity pre-screening, or UX research pipelines.
Side effects
- No faces detected in the image — returns empty face list
- Image URL unreachable or invalid — returns 4xx error
- Image format unsupported — returns error indicating accepted formats
- Image too large or too small — returns size constraint error
- Payment insufficient — x402 payment required response
- Low-confidence detections returned when faces are partially obscured
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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