# PostOnce

**Canonical:** https://apis.io/providers/postonce/  
**Website:** https://postonce.to  
**APIs profiled:** 1

PostOnce is a cross‑posting platform that lets creators and businesses publish content to multiple social media channels from a single dashboard. Users can connect accounts on TikTok, Instagram, YouTube, Facebook, LinkedIn, X, Threads, Bluesky, Pinterest and more, then schedule or instantly push posts across all selected networks. The service offers integrations with tools like ChatGPT, Canva, and n8n, and provides API access for automating workflows, managing media, and tracking performance.

## Kin Score — 52.3 / 100 (developing)

Scored 2026-11-06 under rubric 0.27.0. Trend: falling (-8.7 from 61.0).

| Facet | Score |
|---|---|
| Discoverability | 64.3 |
| Contract Quality | 67.7 |
| Contract Governance | 22.0 |
| Operational Transparency | 39.5 |
| Developer Ergonomics | 29.8 |
| Access Clarity | 61.8 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 20.6 (matched via fallback).

## Agent readiness — 53.3 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | served |
| Idempotency | verified |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |
| Pagination Ratio | partial |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Paid — onboarding: unknown, pricing: paid, trial: no (confidence: high).

## APIs (6)

- **PostOnce Public API** — Public API for PostOnce paid users
- **PostOnce Accounts API** — The Accounts API from PostOnce — 3 operation(s) for accounts.
- **PostOnce Drafts API** — The Drafts API from PostOnce — 2 operation(s) for drafts.
- **PostOnce Media API** — The Media API from PostOnce — 2 operation(s) for media.
- **PostOnce Posts API** — The Posts API from PostOnce — 5 operation(s) for posts.
- **PostOnce Workflows API** — The Workflows API from PostOnce — 2 operation(s) for workflows.

## Agentic access (1)

- **Postonce Agentic Access** — 22 operations · 14 acting

## Security (2)

- **Postonce Authentication** — 1 scheme
- **Postonce Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (2)

- **Postonce Plans Pricing**
- **Postonce Price Estimates**

## Tags

Company, Social Media, Automation, Marketing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/postonce/). Scores are computed from the provider's own public artifacts under a published rubric.