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Relaystation Media Concat
x402
Relaystation Media Concat is a paid API for AI agents from api.relaystation.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Joins 2–10 video or audio clips end-to-end via stream-copy (no re-encode) at $0.0005/MB, billed by the megabyte with a 1¢ x402 minimum.
Price / call$0.01
Success—
StatusUnknown
How this service works
$0.0005/MB. Join 2–10 clips end-to-end by fast stream-copy — no quality loss, no re-encode. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny
Output
A single concatenated media file produced by lossless stream-copy, containing all input clips joined end-to-end in the specified order. No re-encoding occurs so the output retains the original codec and quality. The response includes the output file or a URL to download it, along with billing details based on total MB processed.
Example use cases
Assembling podcast episode from segments
“I have 4 audio segments recorded separately — intro.mp3, interview.mp3, ad.mp3, and outro.mp3 — can you concatenate them into a single podcast episode file without any quality loss?”
Merging trimmed screen recording clips
“I cut my screen recording into 3 parts and want them joined back into one video — screen_part1.mp4, screen_part2.mp4, screen_part3.mp4 — just stream-copy them together without re-encoding.”
Combining social media video clips
“I have 5 short video clips for my social media post and need them stitched end-to-end into one file: clip_a.mp4, clip_b.mp4, clip_c.mp4, clip_d.mp4, clip_e.mp4 — no re-encode so quality stays perfect.”
Technical details
Endpoint
POSThttps://api.relaystation.ai/v1/media/concatWhen to prefer
Choose this endpoint when you need to join multiple video or audio clips together quickly and losslessly — it uses stream-copy so there is zero quality degradation and processing is very fast. Prefer it over re-encoding pipelines when the clips share the same codec and container. It is ideal for assembling pre-edited segments, podcast parts, or recorded clips into a final file without transcoding overhead. The per-MB pricing makes it economical for small-to-medium media files.
Side effects
- Mismatched codecs or container formats between clips may cause stream-copy to fail or produce unplayable output
- Fewer than 2 or more than 10 clips provided results in a validation error
- Input clip URLs that are inaccessible or expired return a fetch/download error
- Total file size or clip count exceeding platform limits returns a size/limit error
- Insufficient USDC balance for the per-MB cost returns a payment failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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