ChatGPT
- Protocol
- GPT Actions
- Endpoint
- https://app.replynodes.com/api/public/v1
- Authentication
- Raw API key in Authorization (no Bearer), or pos_ OAuth app token
- Setup
- ChatGPT setup →
ChatGPT GPT Actions + REST API
Generate and refine platform-perfect posts with a single prompt.
Technical details: integration evidence
ChatGPT uses GPT Actions calling the REST API. It is not an MCP client. MCP clients use the remote MCP server. API keys are created in the app at Developers → API Keys & Agents (/developers).
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- Protocol
- Remote MCP
- Endpoint
- https://app.replynodes.com/api/mcp
- Authentication
- Authorization: Bearer *** key, or MCP OAuth
- Setup
- MCP setup →
Applications and workflow tools
- Protocol
- REST API
- Endpoint
- https://app.replynodes.com/api/public/v1
- Authentication
- Raw API key in Authorization (no Bearer), or pos_ OAuth app token
- Setup
- REST API setup →
Connect ChatGPT to ReplyNodes with a supported GPT Action calling our public REST API. Draft, refine, approve, schedule, and publish content across 30+ social networks using natural language conversations.
The public REST API base URL is https://app.replynodes.com/api/public/v1. For authentication, send the raw API key in the Authorization header with no Bearer prefix, or send an OAuth app token prefixed with pos_ directly in that header. Create API keys at Developers → API Keys & Agents. Read the public API guide and OAuth guide for setup details. The verified OpenAPI publication status explains why no speculative GPT Action schema is linked yet.
How it works
1
Connect a supported GPT Action
Configure a GPT Action to call the ReplyNodes public REST API at https://app.replynodes.com/api/public/v1 using your API key or OAuth app token.
2
Ask ChatGPT to draft and refine
Describe the post or campaign you want. ChatGPT drafts channel-specific copy and lets you iterate in natural language.
3
Approve, schedule, and publish
Hold drafts for review, approve them when ready, then schedule or publish through the Action and ReplyNodes workflow.
Example workflow
Prompt to ChatGPT
"Turn our latest blog post about approval workflows into three posts: X, LinkedIn, and an Instagram caption. Schedule them for tomorrow at 9am, but hold for approval since this is a new topic for us."
ChatGPT fetches the source content, produces channel-appropriate drafts — more context and a professional tone for LinkedIn, something punchier for X, a caption built around the OG image for Instagram — and submits each for approval rather than publishing immediately, exactly as asked.
Frequently asked questions
How does ChatGPT connect to ReplyNodes?
Use a supported GPT Action configured to call ReplyNodes' public REST API at https://app.replynodes.com/api/public/v1. Send API keys raw in the Authorization header with no Bearer prefix, or send an OAuth app token beginning with pos_ directly in the same header. Create API keys at Developers → API Keys & Agents (https://app.replynodes.com/developers).
Can ChatGPT draft, schedule, and publish posts?
Yes. ChatGPT can draft and refine channel-specific posts through the public API, submit drafts for approval, schedule approved posts, and publish them. Drafts can be held for review before publishing.
Does ChatGPT know our brand voice?
You can give it style guidance directly in the prompt or your workspace's custom instructions. ReplyNodes doesn't maintain a separate brand-voice model of its own today — the agent carries that context.
Can I use ChatGPT to check post performance?
Yes — a GPT Action can retrieve available post and performance data through the public REST API, so ChatGPT can use that context when refining the next batch of posts.
Want the longer write-up? Read ChatGPT + ReplyNodes: from draft to published post or see how ChatGPT compares to the other agents ReplyNodes supports on the integrations page.