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Use the Erstan Developer API to let external systems start published agents and read their results. For interactive Claude and Codex clients, the official Erstan plugin adds OAuth-authenticated MCP tools and maintained Skills for building agents and working with authorized workspace content. The first supported workflow is:
  1. Create a scoped API key in Erstan.
  2. List the agents that key can access.
  3. Start an agent run.
  4. Poll the run until it completes.

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Base URL

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Authentication

Public API requests use a workspace API key as a bearer token.
API keys are created in the Erstan app by a workspace owner or admin. The secret is shown once when the key is created.

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Endpoints

See Quickstart for a copy-paste flow.

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Build agents over MCP

Install the official Erstan plugin and authorize the Build profile for the recommended browser-based OAuth flow. Advanced automation clients can connect directly to POST /v1/mcp with an API key holding agents:read plus agents:write. In either case, Erstan rechecks the connection owner’s live access on every call. See Connect a Coding Agent for installation and Build agents over MCP for the complete authoring workflow. For a complete NetSuite scheduled-script example with email body plus optional file attachment, see NetSuite OCR Quote Intake.