Onepostly - 2026 Pricing, Features, Reviews & Alternatives

Onepostly is a unified social media API platform that enables developers and businesses to publish, schedule and measure content across multiple social networks through a single integration endpoint. The platform consolidates access to nine social media networks including X, Instagram, Facebook, Threads, LinkedIn, TikTok, YouTube, Pinterest and Bluesky. It abstracts platform-specific SDKs, authentication flows and media handling rules to eliminate separate integrations for each network. The service manages OAuth token lifecycles, media asset validation and API complexities on behalf of the integrating application.

The platform’s functionality is organized around three primary API interfaces. The Posting API accepts a single HTTP request carrying text content, media URLs, media type classification and a collection of connection identifiers representing linked accounts. Media assets undergo validation against each network’s file size, format and dimension criteria before content is queued for publication. Detailed per network status updates are returned to indicate publication success, pending state or error conditions. The Scheduling API expands posting capabilities by accepting scheduling parameters for future content release. The Analytics API provides programmatic access to engagement data, reach metrics and other performance indicators for published content across all linked accounts.

Onepostly implements webhook delivery for asynchronous notifications, enabling applications to receive real time updates when content moves between queued, published or failed states. Authentication relies on a single API key for integration requests, while end user connections are established through OAuth flows managed entirely by the platform, including automated token refresh and secure credential storage. Standardized error responses communicate violations of network-specific rules and API rate limits based on subscription level.

The platform integrates natively with AI agent frameworks and large language model applications through multiple interfaces. A model context protocol server presents posting, scheduling and analytics operations as structured tools compatible with MCP clients via a unified JSON configuration block. An OpenAPI specification supports function calling with orchestration frameworks and SDKs. Installable skills enable natural language commands to initiate social media workflows directly within development chat environments. All API interactions adhere to RESTful conventions with JSON request and response bodies, and support both synchronous and asynchronous content workflows.