SocialAPI.ai is built and run by Erwan Prost, a French engineer. He’s been shipping open-source Go infrastructure since 2020, and ran a production fintech platform on Kubernetes for two years before this. This page covers how the API works, who’s behind it, and what happens to your data.
Every social platform has its own API, its own OAuth flow, its own webhook format, its own rate limits, and its own error codes. If you want to reply to a comment on Instagram, respond to a Google review, and send a DM on Facebook, you need three completely separate integrations with different token refresh logic, different pagination, and different retry strategies.
Most existing tools focus on publishing and scheduling. They push content out. But the real operational work for businesses and AI agents is inbound: reading what people say, triaging it, and responding. No unified API existed for that workflow across social and review platforms.
So he built one.
Instagram calls it a "comment," Google calls it a "review," Facebook calls it a "message." SocialAPI.ai normalizes everything into consistent types with uniform fields and consistent error codes. One integration handles every platform.
/v1/inbox/comments/{postId}/v1/inbox/reviews/v1/inbox/conversationsThe MCP server was built alongside the REST API because AI agents are a primary use case. Every REST endpoint has a matching MCP tool. Claude, ChatGPT, or any MCP-compatible runtime can connect without custom code.
https://api.social-api.ai/mcp
Create, schedule, and cross-post content across platforms. Then manage the conversations that follow: reply to comments, answer DMs, respond to reviews, all from the same API.
/v1/posts/v1/inbox/reviews/{id}/replyGet notified instantly when someone comments, sends a DM, or leaves a review. Webhooks are delivered over HTTPS with automatic retry and exponential backoff.
comment.receiveddm.receivedmention.receivedSocialAPI.ai is built and run by Erwan Prost, a French software engineer.
From the founder
Writing Go since 2020, mostly open-source infrastructure tooling. The one that took off is azuretls-client (461 stars), a low-level HTTP/TLS client now used in production by other developers. SocialAPI.ai is what he does full-time. Built in France against the EU data-protection framework as a baseline, not a bolt-on.
Erwan
azuretls-client
Go
garage-ui
Go
SocialAPI-AI/SDKs
5 languages5 SDKs, 1 MCP server
Full profile at github.com/Noooste (23 repos, 75 followers, active since 2021).
Before SocialAPI.ai
CapitalSync was a trade copier that Erwan Prost built and ran for two years, from 2023 to 2025. For two years, it replicated trading positions between accounts on MetaTrader 4, MetaTrader 5, and cTrader, in real time, with sub-second latency. Multi-tenant, billed monthly, 24/7 uptime, real money moving through it.
CapitalSync’s infrastructure included a custom Kubernetes operator written in Go that orchestrated Wine-emulated MetaTrader 4 and 5 instances. The hard part was the infrastructure. MetaTrader only runs on Windows, so to scale it Erwan wrapped each instance in Wine, packaged it in Docker, and orchestrated the pods with a custom Kubernetes operator written in Go. The operator handled lifecycle, health checks, resource limits, auto-recovery, and Prometheus metrics. A separate Go service called relay processed trading signals over NATS, with Redis caching and circuit breakers. The rest of the platform (auth, billing, admin, K8s infra) was Go too.
He shut CapitalSync down in December 2025. SocialAPI.ai is being built by the same person, with the same standards: Kubernetes-native, observability-first, infrastructure-grade Go.
Stack
Open-source Go
Since 2020, 2020–2026
CapitalSync
Shut down in December 2025, 2023–2025
SocialAPI.ai
Full-time, 2026
SocialAPI.ai does store data to provide a fast, reliable service.But security is built into every layer, and we only keep what we need.
13 platforms are live today.
| Platform | Capabilities | Status |
|---|---|---|
| Comments, direct messages, mentions, publishing, webhooks | Live | |
| Comments, direct messages, mentions, publishing, webhooks | Live | |
| Threads | Comments, mentions, publishing, webhooks | Live |
| TikTok | Comments, mentions, publishing, webhooks | Live |
| X / Twitter | Comments, direct messages, mentions, publishing | Live |
| YouTube | Comments, publishing | Live |
| Bluesky | Comments, direct messages, mentions, publishing, webhooks | Live |
| Publishing, boards | Live | |
| Telegram | Direct messages, webhooks | Live |
| Google Business Profile | Reviews, publishing | Live |
| Profile publishing | Live | |
| Direct messages, message templates, media & interactive messages, webhooks, business profile, phone numbers | Live | |
| Zalo | Direct messages, article & video posts, webhooks | Live |
No reverse engineering, no scraping. Your accounts won’t get suspended because of anything we’re doing on our side. SocialAPI.ai uses only official platform APIs and does not perform reverse engineering or scraping.
Same stack as CapitalSync. Health checks, circuit breakers, Prometheus metrics, horizontal scaling, all the boring stuff that keeps things up at 3am.
Every connector, every webhook handler, every database migration. If something breaks, the person who wrote it is the one fixing it.
Erwan is French and SocialAPI.ai is a French company. He’s spent his whole career building software inside the EU regulatory framework, so GDPR isn’t a checklist bolted on for a US market, it’s the baseline he’s always built against. Postgres and Redis run in EU regions. SocialAPI.ai is hosted in Europe and is GDPR-aligned by default.
We provide official SDKs and the MCP server on GitHub. The MCP server is also listed on agent marketplaces including Smithery, Composio, MCP.so, PulseMCP, and mcpmarket.
Bug reports, feature requests, and pull requests on the SDKs are welcome. If you are building something cool with the API, I would love to hear about it.
This is an indie project and every email gets a personal reply.
Free tier available. No credit card required. Ships with the MCP server.