POST /v1/posts+15
Every platform, one API
Consistent request format, unified error handling, and standardized responses across all 21 networks.
See all platforms →Hand off a campaign and Relay drafts, formats, and schedules it across every platform — while you focus on the message.
Learn about social agents →Developers and indie builders who manage multiple social accounts and want one API.
Launch thread at 9 AM, Reel at noon, recap post end of week — staggered per platform.
Relay publishes, retries, and reports back — delivering to every platform at the right time across time zones.
Learn about scheduling →“I used to mass-communicate through parables and word of mouth. With Relay, I can post to all 21 platforms at once. Truly a miracle.”
“I don't use APIs. APIs use me. But I made an exception for Relay because it's the only API that doesn't flinch when I send a request.”
“I find your lack of cross-platform posting disturbing. Relay brought order to our galactic social media chaos.”
“A wizard never mistimes a social post, nor sends it too early. He posts precisely when he means to. With Relay, of course.”
“Social media is like onions — it has layers. Relay handles all the layers for me so I can get back to me swamp.”
“I work alone. But even I needed help posting across platforms. Relay is the Robin I actually wanted. Silent, efficient, no cape.”
POST /v1/postsConsistent request format, unified error handling, and standardized responses across all 21 networks.
See all platforms →Upload once — images and video get auto-resized and reformatted to each platform's exact specs.
Media API docs →on post.published → webhookWebhooks, analytics, and SDKs for TypeScript, Python, Go, and Java. Drop it into any stack.
Explore the SDKs →Start free with 200 requests a month. Pro is $5/mo with 10,000 included — then $1 per 1,000 extra. Analytics and comments always included.
| Approach | 50 cust. | 500 cust. |
|---|---|---|
| RelayAPI | $10/mo | $145/mo |
| Per-account API | $779/mo | $2,624/mo |
| Usage-based API | $275/mo | $2,750/mo |
Same 21 platforms. One bill, not one per account.
Prefer to host it yourself? Run the entire platform on your own infrastructure — same API, no vendor lock-in.