Fetch MCP guides: setup, transports, auth, errors
Six guides in the order you need them: connect a server, pick a transport, secure the key, keep results inside your client's limits, read errors, debug the connection.
Client setup
Remote MCP server setup: claude mcp add, mcp.json, bridge
The exact command or config file for each client, where the key goes, and the one check that proves the server connected.
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Transports
MCP stdio vs Streamable HTTP: which one your client needs
What stdio and Streamable HTTP mean for your config, why SSE snippets are outdated, and when the mcp-remote bridge still earns its place.
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Auth and keys
MCP server authentication: bearer keys, OAuth, safe configs
Bearer headers vs OAuth, how each client reads a key without committing it, and a rotation routine that doesn't break every config.
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Token budgets
MCP fetch token budget: client limits and tool size caps
How your client's MCP output limit and the fetch tool's own size cap fit together, and a default budget to start from.
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Fetch errors
MCP fetch errors: what each failure means and what to do
robots.txt, a 403 at the edge, a timeout, a page that needs JavaScript: what each failure means and the honest next step.
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Debugging
MCP server not connecting? A runbook from URL to tool call
A step-by-step runbook from the URL to a working tool call, with MCP Inspector, client logs and the usual failure in each client.
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