GribStream Weather MCP

connects

gribstream.com

NOAA and ECMWF weather forecast MCP for discovery, validation, and GribStream OAuth queries.

https://gribstream.com/mcpWebsiteOAuthMCP 2025-11-25v1.1.1last checked 24 Aug 2026spoke MCP on 3 of 3 checks (30 days)initialize in 885 ms

How to authenticate

Checked against the endpoint by our probe on 24 Aug 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme	OAuth
Issuer	https://gribstream.com
Dynamic client registration	✓Advertised (RFC 7591)
Client ID Metadata Document	✕Not advertised
PKCE	✓S256
Grant types	authorization_code, refresh_token
Protected-resource metadata	✓Published (RFC 9728)
Anonymous access	Handshake succeeds; 12 tools listable
Credentials demanded in prose	✕gribstream_query_runs, gribstream_query_timeseries These tools are listed anonymously and their own descriptions ask for an account or key, but no challenge is issued — so a client has nothing to act on and the refusal arrives as a tool error.
Documentation	https://gribstream.com/mcp

What the probe found

No CORS headers for browser-based clients

A cross-origin preflight came back without Access-Control-Allow-Origin, so the endpoint is reachable from native clients only — code running in a web page is stopped by the browser before a request is ever sent.

12 tools usable without signing in

The server exposes a public surface before authorization: gribstream_build_runs_request, gribstream_build_timeseries_request, gribstream_get_dataset, gribstream_get_expression_reference, gribstream_get_parameter, gribstream_list_datasets, gribstream_list_parameters, gribstream_list_shared_parameters, gribstream_query_runs, gribstream_query_timeseries, gribstream_resolve_shared_parameter, gribstream_validate_request.

Tools

gribstream_build_runs_requestgribstream_build_timeseries_requestgribstream_get_datasetgribstream_get_expression_referencegribstream_get_parametergribstream_list_datasetsgribstream_list_parametersgribstream_list_shared_parametersgribstream_query_runsgribstream_query_timeseriesgribstream_resolve_shared_parametergribstream_validate_request

Contract history

24 Aug 2026v1.1.1first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

[![MCP status](https://mcpi.app/servers/gribstream-weather-mcp/badge.svg)](https://mcpi.app/servers/gribstream-weather-mcp)