MCP server

Server URL: https://mcp.scifig.ai/mcp (Streamable HTTP). Clients that support OAuth connect by signing in to SciFig and approving access; clients that send headers can use an API key as Authorization: Bearer sk_live_….

Creation tools wait up to 25 seconds. If a job is still running, call get_job later; calling the creation tool again creates and charges a new job. Results list each download link and, for charts and flowcharts, the link that opens the result in the SciFig editor.

Claude (claude.ai and Claude Desktop): Settings → Connectors → Add custom connector, enter the server URL, then sign in to SciFig and allow access.

ChatGPT: Settings → Apps → Advanced → Developer mode, create an app with the server URL and OAuth authentication.

Claude Code:

claude mcp add --transport http scifig https://mcp.scifig.ai/mcp

Codex (~/.codex/config.toml):

[mcp_servers.scifig]
url = "https://mcp.scifig.ai/mcp"

Cursor (~/.cursor/mcp.json), with an API key from Settings → Developer:

{
  "mcpServers": {
    "scifig": {
      "url": "https://mcp.scifig.ai/mcp",
      "headers": { "Authorization": "Bearer sk_live_…" }
    }
  }
}

Clients without OAuth can add the header Authorization: Bearer sk_live_… with an API key from Settings → Developer.

generate_chart takes text data only, up to 1 MB. For Excel workbooks (and their sheet_name) or larger files, use POST /charts/generations.

• The server is https://mcp.scifig.ai/mcp (Streamable HTTP). It calls this API on your behalf, so prices, credits, limits and errors are the same.
• Image and attachment arguments accept a file_id, an https URL or a data URL; URLs and data URLs are uploaded first with POST /files, so they count against the upload limits. SciFig’s own URLs are refused (pass the file_id), and redirects are followed only to other https addresses.
• A request to the MCP server is limited to 4 MB. Base64 makes a file a third larger, so a data URL can carry about 3 MB; pass larger files as an https URL.
• The server checks your credential only on initialize and tools/call. An expired or revoked token returns 401 so the client can refresh or sign in again; a banned account, or one being deleted, returns 403.
• Finished image results are shown inline when they are at most 1 MB; every result includes download links, and chart and flowchart results add the link that opens them in the SciFig editor.
• Every creation uses a new Idempotency-Key unless the assistant passes idempotency_key, so asking again creates and charges a new job. Use get_job to follow up.
• An error result echoes idempotency_key and, when a job exists, job_id. After a timeout or a server error, retry with the same key or call get_job; a refusal such as 402 INSUFFICIENT_CREDITS stays stored under its key, so send it again with a new key.