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MCP Gateway publishes your API as a hosted MCP server. You import an OpenAPI document, curate the generated tools, store upstream credentials, mint client tokens, and publish a version that MCP clients can call — Cursor, Codex, Claude Code, ChatGPT, VS Code, or a Fetch Hive agent. You do not need a workspace to use MCP Gateway. It is account-scoped. Hosted MCP Gateway is for a live API (public HTTPS). To point an editor at a WIP or branch API on localhost, self-host the open-source CLI on your machine.

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How do I create a gateway?

Open MCP Gateway and click Create. Give the gateway a name and a URL slug. The public MCP path is /g/{slug} on the hosted MCP host. From Live Chat while signed out, the product switcher opens MCP Gateway so you can try a public OpenAPI document before creating an account. Choose a source:
  • URL — a public HTTPS OpenAPI document. Fetch Hive fetches it through the hosted runtime, not from your browser.
  • Upload — an OpenAPI 3.0 or 3.1 document up to 5 MB.
Compile runs automatically. Small specs finish in the create request. Larger specs stay in Compiling until you refresh. Tool names, titles, and descriptions come from the OpenAPI metadata. You can rename, retitle, disable, or reorder tools after compile. Those edits survive a recompile. Operations that disappear from a later spec stay in the list as disabled orphans so you can see what changed.

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How do I connect the upstream API?

Set upstream credentials before you publish if the API requires auth. Supported types:
  • None
  • Bearer token
  • Basic username and password
  • API key header
  • Custom headers
Fetch Hive stores credentials encrypted. The dashboard never shows the secret again after you save it. Use Test to confirm the hosted runtime can authenticate to the API. Test does not echo the upstream body. Only account owners can set, rotate, or clear credentials.

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How do I mint MCP client tokens?

MCP clients authenticate with a gateway token, not your Fetch Hive login and not the upstream API key. Create a token with a name. The raw value is shown once. Store it in the MCP client. Later list views show only the prefix and last four characters. Revoke a token to drop it from the live server immediately. Only account owners can mint or revoke tokens.

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How do I publish, pause, or roll back?

Publish freezes the current compiled tools and credentials into a live version. Later edits go to a new working copy and do not change what MCP clients see until you publish again. Unpublish pauses the gateway. MCP clients receive an unavailable response until you publish again. Rollback points traffic at a previously published version without changing your working copy.

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What are the plan limits?

MCP Gateway uses your existing Fetch Hive plan. Typical caps: Lifetime plans match the equivalent Growth or Pro caps. Hitting a gateway or tool cap returns an upgrade error. Hitting the daily request cap returns a rate-limit error until UTC midnight. Request logs follow your plan’s log retention window. Widen the range past that window and the API asks you to upgrade.

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Connecting an MCP client

After publish, point Cursor, Codex, Claude Code, ChatGPT, or VS Code at the hosted MCP URL for your slug and send the gateway token as a bearer token. Do not send upstream API keys to the MCP client. To run the same compiler against a local or branch API (or on your own VPS), see Self-host MCP Gateway.

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Tool confirmation

Each tool can require a confirmation before it runs:
  • None — the tool runs when the client calls it.
  • Ask the person using the AI app — the MCP client must support confirmation. A client that does not will get an error for that tool, and the tool will not run.
  • Ask my team — the call waits until someone on the account allows it once or denies it. Allow once and deny are the only decisions. The approval uses the account’s oldest workspace.
Destructive tools start on “ask the person using the AI app” when you enable them. Publishing with any confirmation tool shows a note that unsupported clients will error on those tools. The setting is off until Fetch Hive enables it for the account.