Hermios API - Hermios Developers

Hermios gives every organization the same four ways in:

Interface	Use it for	Endpoint
REST	Scripts, integrations, no-code tools	`https://api.hermios.app/rest/...`
GraphQL	Apps that want exactly the fields they ask for	`https://api.hermios.app/graphql` (records), `/metadata` (data model)
Webhooks	Getting told when records change	Your HTTPS endpoint
MCP	AI assistants such as Codex and Claude	`https://api.hermios.app/mcp`

Every request runs as someone: a member, an API key with a role, or an app. Hermios applies that principal’s role and any record-level sharing, so the API never shows more than the Hermios app would.

Your workspace’s API is your data model

Objects and fields are generated from your workspace’s data model. Standard objects (companies, people, opportunities, tasks, notes, …) are always there. Custom objects you add, Hermios apps such as Sales Insights, and industry packs add their own. See Objects to list what your workspace has.

Hosts

Host	What it serves
`https://api.hermios.app`	REST, GraphQL, MCP, OAuth, OpenAPI documents
`https://<your-org>.hermios.app`	Your organization’s app (and public logic-function routes)
`https://app.hermios.app`	Sign in, sign up, support

Next

Authenticate

Create an API key or connect with OAuth.

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