Independent review. IonBin has no partnership with Writesonic and was not paid for this page. Our evaluation is our own, based on public documentation and our research. Product names are trademarks of their owners and are used for identification only. How disclosure works.
AI writing platform that also tracks how a brand shows up in AI answers (GEO). Its MCP server, on paid plans, has 87 tools, mostly read-only, for pulling that visibility data into AI assistants.
Billed annually, Writesonic lists Starter at $79, Basic at $199 and Growth at $399 per month, with a free trial; Enterprise is custom. The MCP server needs any active paid plan and a project with tracked prompts. Checked 2026-10-17. source ↗
How Writesonic connects to each AI platform: native connector or MCP, API through code the agent writes, browser control, or file upload.
| Platform | MCP / connector | API (agent-written code) | Browser | Upload / export |
|---|---|---|---|---|
| Claude (incl. Claude Code) | Confirmed Setup steps in Writesonic's MCP docs Writesonic docs ↗Claude (incl. Claude Code) MCP docs ↗ | Confirmed Claude (incl. Claude Code) can run code; Writesonic publishes an API. Writesonic API ↗Claude (incl. Claude Code) docs ↗ | Confirmed Claude Code with the Claude in Chrome extension (Chrome, Edge and other Chromium browsers) Claude (incl. Claude Code) browser docs ↗ | Confirmed Export from Writesonic, then works on the files in your project; chat accepts attachments Claude (incl. Claude Code) docs ↗ |
| OpenAI Codex | Not documented Writesonic has an official MCP server and OpenAI Codex supports MCP, but Writesonic's docs don't name this pairing. Auth setup may differ. Writesonic MCP docs ↗OpenAI Codex MCP docs ↗ | Confirmed OpenAI Codex can run code; Writesonic publishes an API. Writesonic API ↗OpenAI Codex docs ↗ | Confirmed Only in the ChatGPT desktop app; not in the Codex CLI or IDE extension OpenAI Codex browser docs ↗ | Confirmed Export from Writesonic, then works on local repositories OpenAI Codex docs ↗ |
| Google Antigravity | Not documented Writesonic has an official MCP server and Google Antigravity supports MCP, but Writesonic's docs don't name this pairing. Auth setup may differ. Writesonic MCP docs ↗Google Antigravity MCP docs ↗ | Confirmed Google Antigravity can run code; Writesonic publishes an API. Writesonic API ↗Google Antigravity docs ↗ | Confirmed Browser subagent via /browser, documented as an Antigravity App feature; the IDE has separate browser docs Google Antigravity browser docs ↗ | Confirmed Export from Writesonic, then works on local projects and worktrees Google Antigravity docs ↗ |
Writesonic's docs also name: ChatGPT.
Confirmed means both the tool's and the platform's official docs describe that route (links in the cell); IonBin has not tested every pairing. Not documented means it may work, but no official docs describe that route end to end. Checked Oct 17, 2026.
| Level | Status | Detail / source |
|---|---|---|
| Native connector / MCP | Yes | Official docs ↗ |
| API / CLI | Yes | Official docs ↗ |
| Browser-only | No | Web app; also reachable programmatically |
| Bulk upload / import | No | No bulk import found (2026-10-17) |
Recorded Oct 17, 2026. Setup and plan limits vary; check the vendor's docs. How levels are assigned.
Via its official MCP server, from MCP-capable platforms such as ChatGPT, Claude, Gemini (Google), Google Antigravity, OpenAI Codex.
Via its API, through automation hubs: Gumloop, Make, n8n, Zapier.
No long-form review yet. Verdict is based on research, not hands-on testing.
Content optimization for search: briefs, guidelines and a content score for drafts. Its hosted MCP server, on the AI Search Analytics, Pro and Peace of Mind plans, lets an AI assistant score and revise drafts in the same chat.
SEO and competitive research suite: keyword research, backlinks, site audits and AI-search visibility. Its MCP server, included from the Starter plan, lets agents pull Semrush data using API units.
