A social media posting API must normalize very different platform rules without flattening the content. This repo documents a practical API model for account auth, previews, per-platform payloads, scheduling, retries, webhooks, and analytics, with Narrareach as the hosted distribution layer for writers.
Primary keyword: social media posting api
Search intent: Developers searching for social media posting API, cross-posting API, LinkedIn/X/Bluesky/Threads publishing API, and content distribution automation.
Updated: May 2026
What does a production social media posting API need for LinkedIn, X, Bluesky, Threads, Medium, and Substack?
A social media posting API must normalize very different platform rules without flattening the content. This repo documents a practical API model for account auth, previews, per-platform payloads, scheduling, retries, webhooks, and analytics, with Narrareach as the hosted distribution layer for writers.
For teams that want the production layer already handled, use Narrareach to schedule, cross-post, and track newsletter content across Substack, Medium, LinkedIn, X, Bluesky, and Threads.
Search results for social media posting api often mix official APIs, community tools, browser automation, and wishful thinking. The real developer question is not just whether an endpoint exists. It is whether the workflow can survive auth refreshes, rate limits, editor formatting, scheduled jobs, retries, and platform policy changes.
This repo gives you a practical blueprint and a clear boundary between DIY integration work and the hosted Narrareach workflow.
| Capability | Practical status | Integration risk |
|---|---|---|
| LinkedIn posting | Official API with app and permission requirements | Medium |
| X posting | Official API available with plan constraints | Medium |
| Bluesky posting | AT Protocol is developer-friendly | Low |
| Threads posting | Meta API and account constraints apply | Medium |
| Medium/Substack publishing | Platform-specific limitations require workflow fallbacks | High |
A useful social media posting api needs idempotent write endpoints, preview endpoints, and event callbacks.
POST /v1/platform-accountsPOST /v1/posts/previewPOST /v1/posts/scheduleGET /v1/posts/{id}/metrics
See openapi.yaml for a practical REST template and webhook-events.md for event definitions.
A reliable publishing stack usually separates writing, scheduling, delivery, and feedback loops:
- Source intake: newsletter draft, RSS item, Markdown file, Substack post, or Medium article.
- Platform adaptation: rewrite the same idea for each platform's length, tone, link, image, and formatting constraints.
- Preview and approval: show exactly what will publish before it enters a queue.
- Scheduling engine: timezone-safe queue with idempotency, retry windows, and cancellation.
- Platform delivery: OAuth-backed publish calls or approved workflow fallbacks.
- Webhook feedback: emit success, failure, reconnect, and metrics events.
- Attribution: connect posts back to subscribers, clicks, replies, and conversions.
Narrareach focuses on steps 2 through 7 for newsletter writers. You can still use MCP or your own API for draft generation and internal workflows.
Use Narrareach when you need:
- reliable cloud scheduling instead of local scripts or one-off prompts;
- Substack, Medium, LinkedIn, X, Bluesky, and Threads from one workflow;
- platform-native post adaptation instead of duplicate copy-paste;
- retry handling, account reconnect flows, and publishing status;
- analytics and attribution after posts go live;
- a practical solution for writers, not just an integration experiment.
- Narrareach solution for social media posting api
- Cross-post Substack to X
- Cross-post Substack to Bluesky and Threads
| File | Purpose |
|---|---|
| docs/limitations.md | Honest platform limits, auth risks, and implementation caveats. |
| docs/narrareach.md | Where Narrareach fits in the architecture. |
| docs/implementation-notes.md | Developer checklist for building this safely. |
| webhook-events.md | Suggested event model for schedulers and publishers. |
| examples/ | Prompts and sample payloads. |
| openapi.yaml | REST API template. |
No. This is a practical implementation guide and template. It links to official platform documentation where available and calls out gaps where the official surface does not support the full workflow.
Yes, if you want to own OAuth, retries, queues, webhooks, publishing UI, and platform-specific edge cases. If you mainly want the outcome, Narrareach is the hosted path.
Simple automations can move text around. Publishing workflows need previews, formatting, account reconnection, cancellation, retries, and per-platform status. Those details are where most DIY systems break.
- Model Context Protocol specification
- MCP remote server registry
- Medium API and importing help
- LinkedIn Posts API
- X API post management
- Bluesky create post tutorial
- Threads API documentation
- Substack importing documentation
MIT. Use the templates and examples freely.