GribStream Weather MCP
REMOTE · GRIBSTREAM.COM · SCANNED SEP 22
NOAA and ECMWF weather forecast MCP for discovery, validation, and GribStream OAuth queries.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 10 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability75
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 4354 tokens (~311/item across 14 items; 12 tools + 2 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 12 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 14 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
How do I install the GribStream Weather MCP server?
GribStream Weather MCP is a hosted endpoint at https://gribstream.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · gribstream.com
claude mcp add --transport http com-gribstream-mcp 'https://gribstream.com/mcp'
{
"mcpServers": {
"com-gribstream-mcp": {
"url": "https://gribstream.com/mcp"
}
}
} {
"servers": {
"com-gribstream-mcp": {
"type": "http",
"url": "https://gribstream.com/mcp"
}
}
} [mcp_servers.com-gribstream-mcp] url = "https://gribstream.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-gribstream-mcp": {
"type": "remote",
"url": "https://gribstream.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-gribstream-mcp --url 'https://gribstream.com/mcp' --transport streamable-http
mcp_servers:
com-gribstream-mcp:
url: "https://gribstream.com/mcp" {
"McpServers": {
"com-gribstream-mcp": {
"Transport": "http",
"Url": "https://gribstream.com/mcp"
}
}
} assistant mcp add com-gribstream-mcp -t streamable-http -u 'https://gribstream.com/mcp'
{
"mcpServers": {
"com-gribstream-mcp": {
"type": "http",
"url": "https://gribstream.com/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 26 Aug 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
- 18 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “gribstream_get_parameter” rewrote its description, which is the text the model reads security
- Tool “gribstream_list_shared_parameters” rewrote its description, which is the text the model reads security
- Tool “gribstream_query_runs” rewrote its description, which is the text the model reads security
- Tool “gribstream_query_timeseries” rewrote its description, which is the text the model reads security
- Tool “gribstream_resolve_shared_parameter” rewrote its description, which is the text the model reads security
- Schema quality: 241 → 311 ▼ functional
- Server version: 1.0.0 → 1.1.1 functional
- “gribstream_query_runs” added an optional parameter “delivery” cosmetic
- “gribstream_query_timeseries” added an optional parameter “delivery” cosmetic
- “gribstream_build_runs_request” reworded the description of “request” cosmetic
- “gribstream_build_timeseries_request” reworded the description of “request” cosmetic
- “gribstream_query_runs” reworded the description of “accept” cosmetic
- “gribstream_query_runs” reworded the description of “max_bytes” cosmetic
- “gribstream_query_runs” reworded the description of “request” cosmetic
- “gribstream_query_timeseries” reworded the description of “accept” cosmetic
- “gribstream_query_timeseries” reworded the description of “max_bytes” cosmetic
- “gribstream_query_timeseries” reworded the description of “request” cosmetic
- 17 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “gribstream_query_runs” rewrote its description, which is the text the model reads security
- Tool “gribstream_query_timeseries” rewrote its description, which is the text the model reads security
- Schema quality: 200 → 241 ▼ functional
- 13 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Tool “gribstream_build_runs_request” rewrote its description, which is the text the model reads security
- Tool “gribstream_build_timeseries_request” rewrote its description, which is the text the model reads security
- Tool “gribstream_query_runs” rewrote its description, which is the text the model reads security
- Tool “gribstream_query_timeseries” rewrote its description, which is the text the model reads security
- Schema quality: 178 → 200 ▼ functional
- “gribstream_build_runs_request” reworded the description of “accept” cosmetic
- “gribstream_build_timeseries_request” reworded the description of “accept” cosmetic
- “gribstream_query_runs” reworded the description of “accept” cosmetic
- “gribstream_query_runs” reworded the description of “max_bytes” cosmetic
- “gribstream_query_timeseries” reworded the description of “accept” cosmetic
- “gribstream_query_timeseries” reworded the description of “max_bytes” cosmetic
- 12 Aug 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: 139 → 178 ▼ functional
- MCP protocol: Implements a current MCP spec version (2026-07-28). functional
- MCP protocol version: 2025-11-25 → 2026-07-28 functional
- New tool “gribstream_query_runs” functional
- New tool “gribstream_query_timeseries” functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 22 Sept 2026 · Probed https://gribstream.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=gribstream.com | CN=YE2,O=Let's Encrypt,C=US | 26 Aug 2026 | 24 Nov 2026 | ECDSA 256 | ECDSA-SHA384 | 5f823887bbd2cf75c8412681a3687f28e4a |
| SANs: *.gribstream.com, *.teatromagico.net, gribstream.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of gribstream.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| gribstream.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains; preload |
| content-security-policy | frame-ancestors 'self' |
| x-content-type-options | nosniff |
| x-frame-options | SAMEORIGIN |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | accelerometer=(), autoplay=(), camera=(), display-capture=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), usb=() |
| www-authenticate | Bearer resource_metadata="https://gribstream.com/.well-known/oauth-protected-resource/mcp" |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://gribstream.com/mcp | Verified | 200 | |
| http (plaintext) | http://gribstream.com/mcp | HTTPS enforced | 301 | https://gribstream.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
gribstream_build_runs_request Build runs API request ~285
NO AUTH / PUBLIC / READ-ONLY. Builds and validates a copy-pasteable authenticated /api/v2/{dataset}/runs HTTP request without sending it. This tool does not execute the request, query weather values, or return forecast data. Use gribstream_query_runs when the user asks for actual model-run forecast data or CSV/JSON/NDJSON/Parquet data. Generated direct API requests include Accept-Encoding: gzip, and generated curl commands use --compressed so large responses can be transferred compressed when the client supports it. The request body must use exact selectors discovered from the catalog or shared-parameter tools, with coordinates in request.coordinates and selectors in request.variables.
| Name | Type | Req | Description |
|---|---|---|---|
| accept | string | – | Desired response format for the eventual HTTP request. Prefer application/vnd.apache.parquet for dense grids and large typed tabular results. |
| dataset | string | yes | Dataset code, for example gfs, ifsoper, nbm, hrrr, or urma. |
| request | object | yes | Runs request body. Use timesList for exact UTC model run times, or the half-open range forecastedFrom+forecastedUntil where forecastedFrom is inclusive, forecastedUntil is exclusive, and forecastedFr… |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | yes | GribStream API request body. |
| curl | string | yes | Copy-pasteable curl command. |
| endpoint | string | yes | GribStream endpoint. |
| errors | array | – | Validation errors. |
| headers | object | yes | HTTP headers for the generated request. Includes Accept-Encoding: gzip so large direct API responses can be transferred compressed when the client supports decompression. |
| method | string | yes | HTTP method for the generated request. |
| timestamp_semantics | string | yes | Endpoint-specific timestamp guidance. |
| url | string | yes | Public GribStream API URL. |
| valid | boolean | yes | Whether the request body passed local shape, selector, and expression checks. |
| warnings | array | – | Validation warnings. |
No examples provided.
gribstream_build_timeseries_request Build timeseries API request ~332
NO AUTH / PUBLIC / READ-ONLY. Builds and validates a copy-pasteable authenticated /api/v2/{dataset}/timeseries HTTP request without sending it. This tool does not execute the request, query weather values, or return forecast data. Use gribstream_query_timeseries when the user asks for actual weather values or CSV/JSON/NDJSON/Parquet data. Generated direct API requests include Accept-Encoding: gzip, and generated curl commands use --compressed so large responses can be transferred compressed when the client supports it. Do not include request.asOf unless the user explicitly wants backtesting, time travel, or a historical model-run cutoff. The request body must use exact selectors discovered from the catalog or shared-parameter tools, with coordinates in request.coordinates and selectors in request.variables.
| Name | Type | Req | Description |
|---|---|---|---|
| accept | string | – | Desired response format for the eventual HTTP request. Prefer application/vnd.apache.parquet for dense grids and large typed tabular results. |
| dataset | string | yes | Dataset code, for example gfs, ifsoper, nbm, hrrr, or urma. |
| request | object | yes | Timeseries request body. Use timesList for exact UTC valid times, or the half-open range fromTime+untilTime where fromTime is inclusive, untilTime is exclusive, and fromTime must be earlier than unti… |
| Name | Type | Req | Description |
|---|---|---|---|
| body | object | yes | GribStream API request body. |
| curl | string | yes | Copy-pasteable curl command. |
| endpoint | string | yes | GribStream endpoint. |
| errors | array | – | Validation errors. |
| headers | object | yes | HTTP headers for the generated request. Includes Accept-Encoding: gzip so large direct API responses can be transferred compressed when the client supports decompression. |
| method | string | yes | HTTP method for the generated request. |
| timestamp_semantics | string | yes | Endpoint-specific timestamp guidance. |
| url | string | yes | Public GribStream API URL. |
| valid | boolean | yes | Whether the request body passed local shape, selector, and expression checks. |
| warnings | array | – | Validation warnings. |
No examples provided.
gribstream_get_dataset Get dataset metadata ~83
NO AUTH / PUBLIC / READ-ONLY. Gets full public metadata for one dataset code, including archive coverage, cadence, tags, source links, and members. This tool does not query weather values and cannot return forecast data.
| Name | Type | Req | Description |
|---|---|---|---|
| dataset | string | yes | Dataset code, for example gfs, nbm, ifsoper, hrrr, urma. |
Structured output declared, but exposes no named fields.
No examples provided.
gribstream_get_expression_reference Get expression reference ~69
NO AUTH / PUBLIC / READ-ONLY. Gets the GribStream expression language reference, including github.com/expr-lang/expr syntax guidance, alias rules, examples, and the full exported func.* math function list. This tool does not query weather values and cannot return forecast data.
Input schema present but exposes no named parameters.
Structured output declared, but exposes no named fields.
No examples provided.
gribstream_get_parameter Get parameter selectors ~126
NO AUTH / PUBLIC / READ-ONLY. Gets detailed metadata and exact selector variations for one already-known dataset-native parameter code. Parameter codes are case-sensitive. For a common natural-language concept such as 2 metre temperature, use gribstream_resolve_shared_parameter before guessing a native code. This tool does not query weather values and cannot return forecast data.
| Name | Type | Req | Description |
|---|---|---|---|
| dataset | string | yes | Dataset code, for example ifsoper. |
| parameter | string | yes | Exact case-sensitive parameter short name, for example 100u, 2t, TMP, or APCP. |
Structured output declared, but exposes no named fields.
No examples provided.
gribstream_list_datasets List GribStream datasets ~157
NO AUTH / PUBLIC / READ-ONLY. Lists public GribStream datasets and metadata. This tool does not query weather values and cannot return forecast data. Supports catalog filters such as code, family, tag, and is_ensemble.
| Name | Type | Req | Description |
|---|---|---|---|
| code | – | – | Dataset code or list of dataset codes, for example gfs or ["gfs", "ifsoper"]. |
| family | string | – | Dataset family filter, for example gfs, ifs, nbm, hrrr, rap, rtma, urma. |
| is_ensemble | boolean | – | Filter to ensemble datasets when true, or deterministic datasets when false. |
| tag | – | – | Tag or list of tags. Multiple tags use AND semantics in the API. |
| Name | Type | Req | Description |
|---|---|---|---|
| datasets | array | yes | Public GribStream dataset summaries. |
No examples provided.
gribstream_list_parameters List dataset parameters ~65
NO AUTH / PUBLIC / READ-ONLY. Lists parameter summaries for one dataset. Use this before selecting exact case-sensitive parameter codes. This tool does not query weather values and cannot return forecast data.
| Name | Type | Req | Description |
|---|---|---|---|
| dataset | string | yes | Dataset code, for example ifsoper. |
| Name | Type | Req | Description |
|---|---|---|---|
| parameters | array | yes | Parameter summaries for one GribStream dataset. |
No examples provided.
gribstream_list_shared_parameters List shared weather parameters ~123
NO AUTH / PUBLIC / READ-ONLY. Lists normalized shared parameter presets that can map one logical signal across datasets. Use this only when the shared parameter code is uncertain; when a common code such as temperature_2m is already clear, call gribstream_resolve_shared_parameter directly. This tool does not query weather values and cannot return forecast data.
| Name | Type | Req | Description |
|---|---|---|---|
| dataset | – | – | Optional dataset code or list of dataset codes to filter supported shared parameters. |
| dataset_mode | string | – | Whether every listed dataset must support the preset or any one may support it. |
| Name | Type | Req | Description |
|---|---|---|---|
| shared_parameters | array | yes | Shared weather parameter summaries. |
No examples provided.
gribstream_query_runs Query runs API ~1,030
AUTH REQUIRED / DATA QUERY. Executes an authenticated /api/v2/{dataset}/runs request and returns actual weather/forecast data values across model runs. Use this tool, not the NO AUTH request-building or metadata tools, when the user asks to fetch, retrieve, download, return, or analyze model-run history, forecast aging, changing forecasts, CSV/JSON/NDJSON/Parquet data, plots, or analysis. Defaults to inline CSV for compatibility; use URL delivery for dense grids and large tabular results. Time ranges are half-open: the start is inclusive and the end is exclusive. The start must be earlier than the end; equal bounds select no times. Use timesList for one exact valid time on /timeseries or one exact model run time on /runs. When a live query returns a resource_link, the exact signed HTTPS URL is the result: download it directly once with an available HTTPS or file-download capability, without an API token. This consumes the selected GribStream MCP result; it is not a direct GribStream API call or a connector bypass. Do not look for an MCP resources/read tool, and do not repeat the query merely to obtain the file bytes. If the client reports that network or allowlist policy blocks the returned resource_link, do not retry URL delivery. For CSV, JSON, or NDJSON whose reported size is at most 10000000 bytes, retry the same request at most once with delivery=inline. Parquet cannot use inline delivery. If the artifact is larger, reduce the request using the documented split order before one inline CSV retry. For dense grids or large tabular results, use delivery=url so MCP returns a short-lived signed HTTPS resource link instead of putting the full dataset into tool output. Prefer application/vnd.apache.parquet only when a compatible Parquet reader is already known to be available. If reader availability is unknown, do not spend tool calls probing or installing packages; use text/csv with delivery=url immediately. Use one grid request, process the downloaded file locally,…
| Name | Type | Req | Description |
|---|---|---|---|
| accept | string | – | Desired response format. Defaults to text/csv for compatibility. For dense grids and large tabular analysis, use application/vnd.apache.parquet only when a compatible reader is already known to be av… |
| dataset | string | yes | Dataset code, for example gfs, ifsoper, nbm, hrrr, or urma. |
| delivery | string | – | Optional result delivery mode. Set inline for CSV, JSON, or NDJSON in the MCP result, or url for a short-lived signed resource link. Omission defaults to inline for text formats; Parquet always uses… |
| max_bytes | integer | – | Maximum inline response bytes to return through MCP for CSV/JSON/NDJSON. Default and server-side maximum are 10000000. This setting does not limit artifacts delivered by signed URL. For dense grids o… |
| request | object | yes | Runs request body. Use timesList for exact UTC model run times, or the half-open range forecastedFrom+forecastedUntil where forecastedFrom is inclusive, forecastedUntil is exclusive, and forecastedFr… |
| Name | Type | Req | Description |
|---|---|---|---|
| binary | boolean | – | Whether the result resource is binary rather than text. |
| bytes | integer | – | Number of bytes in the full inline response or downloadable artifact. |
| cache_hit | boolean | – | Whether a URL-delivered artifact was served from the shared short-lived response cache. |
| columns | array | – | CSV header columns, keys from the first NDJSON object, or leaf columns read from Parquet metadata. |
| content_type | string | – | MIME type for a result resource, for example text/csv, application/ndjson, or application/vnd.apache.parquet. |
| data | array | – | JSON array response when the GribStream API returns a top-level JSON array. |
| dataset | string | – | Dataset code used for the live query. |
| delivery | string | – | Result delivery mode. URL-delivered results use url; text formats are inline when delivery is omitted. |
| endpoint | string | – | GribStream API endpoint used for the live query, for example timeseries or runs. |
| fallback_guidance | string | – | What to do once if client network policy blocks a signed resource link. |
| generated_at | string | – | UTC timestamp at which a URL-delivered artifact was generated. |
| ordering_warning | string | – | Reminder that live query rows are not guaranteed to be sorted. |
| preview | string | – | Short preview of an inline text response. URL-delivered results omit preview. |
| request_hash | string | – | SHA-256 hash of the endpoint, dataset, response format, and canonical request body. |
| response_hash | string | – | SHA-256 hash of the upstream response body, computed while reading the response. |
| result_hash | string | – | SHA-256 hash combining request_hash and response_hash. A short prefix is included in suggested_filename. |
| rows | integer | – | Number of tabular data rows in a CSV, NDJSON, or Parquet response. CSV header rows are not counted. |
| schema | array | – | Best-effort tabular schema. CSV and NDJSON columns are typed as strings unless the client infers richer types; Parquet reports its stored leaf types. |
| signed_url_expires_at | string | – | UTC expiration timestamp for an artifact resource link. |
| split_guidance | string | – | Recommended split order for oversized MCP live queries. |
| suggested_filename | string | – | Collision-resistant filename to use when saving this result locally. Use it instead of generic names like timeseries.csv when comparing multiple model or dataset results. |
| truncated | boolean | – | Whether the inline tabular response was truncated. Successful live query responses are not truncated; oversized responses return an error instead. |
| uri | string | – | URI of the result resource. For URL delivery this is the short-lived signed HTTPS URL in the resource_link content block. |
No examples provided.
gribstream_query_timeseries Query timeseries API ~1,072
AUTH REQUIRED / DATA QUERY. Executes an authenticated /api/v2/{dataset}/timeseries request and returns actual weather/forecast data values. Use this tool, not the NO AUTH request-building or metadata tools, when the user asks to fetch, retrieve, download, return, or analyze weather values, CSV/JSON/NDJSON/Parquet data, plots, heatmaps, or best-available values by valid time. Defaults to inline CSV for compatibility; use URL delivery for dense grids and large tabular results. Time ranges are half-open: the start is inclusive and the end is exclusive. The start must be earlier than the end; equal bounds select no times. Use timesList for one exact valid time on /timeseries or one exact model run time on /runs. When a live query returns a resource_link, the exact signed HTTPS URL is the result: download it directly once with an available HTTPS or file-download capability, without an API token. This consumes the selected GribStream MCP result; it is not a direct GribStream API call or a connector bypass. Do not look for an MCP resources/read tool, and do not repeat the query merely to obtain the file bytes. If the client reports that network or allowlist policy blocks the returned resource_link, do not retry URL delivery. For CSV, JSON, or NDJSON whose reported size is at most 10000000 bytes, retry the same request at most once with delivery=inline. Parquet cannot use inline delivery. If the artifact is larger, reduce the request using the documented split order before one inline CSV retry. For dense grids or large tabular results, use delivery=url so MCP returns a short-lived signed HTTPS resource link instead of putting the full dataset into tool output. Prefer application/vnd.apache.parquet only when a compatible Parquet reader is already known to be available. If reader availability is unknown, do not spend tool calls probing or installing packages; use text/csv with delivery=url immediately. Use one grid request, process the downloaded file locally, and never prin…
| Name | Type | Req | Description |
|---|---|---|---|
| accept | string | – | Desired response format. Defaults to text/csv for compatibility. For dense grids and large tabular analysis, use application/vnd.apache.parquet only when a compatible reader is already known to be av… |
| dataset | string | yes | Dataset code, for example gfs, ifsoper, nbm, hrrr, or urma. |
| delivery | string | – | Optional result delivery mode. Set inline for CSV, JSON, or NDJSON in the MCP result, or url for a short-lived signed resource link. Omission defaults to inline for text formats; Parquet always uses… |
| max_bytes | integer | – | Maximum inline response bytes to return through MCP for CSV/JSON/NDJSON. Default and server-side maximum are 10000000. This setting does not limit artifacts delivered by signed URL. For dense grids o… |
| request | object | yes | Timeseries request body. Use timesList for exact UTC valid times, or the half-open range fromTime+untilTime where fromTime is inclusive, untilTime is exclusive, and fromTime must be earlier than unti… |
| Name | Type | Req | Description |
|---|---|---|---|
| binary | boolean | – | Whether the result resource is binary rather than text. |
| bytes | integer | – | Number of bytes in the full inline response or downloadable artifact. |
| cache_hit | boolean | – | Whether a URL-delivered artifact was served from the shared short-lived response cache. |
| columns | array | – | CSV header columns, keys from the first NDJSON object, or leaf columns read from Parquet metadata. |
| content_type | string | – | MIME type for a result resource, for example text/csv, application/ndjson, or application/vnd.apache.parquet. |
| data | array | – | JSON array response when the GribStream API returns a top-level JSON array. |
| dataset | string | – | Dataset code used for the live query. |
| delivery | string | – | Result delivery mode. URL-delivered results use url; text formats are inline when delivery is omitted. |
| endpoint | string | – | GribStream API endpoint used for the live query, for example timeseries or runs. |
| fallback_guidance | string | – | What to do once if client network policy blocks a signed resource link. |
| generated_at | string | – | UTC timestamp at which a URL-delivered artifact was generated. |
| ordering_warning | string | – | Reminder that live query rows are not guaranteed to be sorted. |
| preview | string | – | Short preview of an inline text response. URL-delivered results omit preview. |
| request_hash | string | – | SHA-256 hash of the endpoint, dataset, response format, and canonical request body. |
| response_hash | string | – | SHA-256 hash of the upstream response body, computed while reading the response. |
| result_hash | string | – | SHA-256 hash combining request_hash and response_hash. A short prefix is included in suggested_filename. |
| rows | integer | – | Number of tabular data rows in a CSV, NDJSON, or Parquet response. CSV header rows are not counted. |
| schema | array | – | Best-effort tabular schema. CSV and NDJSON columns are typed as strings unless the client infers richer types; Parquet reports its stored leaf types. |
| signed_url_expires_at | string | – | UTC expiration timestamp for an artifact resource link. |
| split_guidance | string | – | Recommended split order for oversized MCP live queries. |
| suggested_filename | string | – | Collision-resistant filename to use when saving this result locally. Use it instead of generic names like timeseries.csv when comparing multiple model or dataset results. |
| truncated | boolean | – | Whether the inline tabular response was truncated. Successful live query responses are not truncated; oversized responses return an error instead. |
| uri | string | – | URI of the result resource. For URL delivery this is the short-lived signed HTTPS URL in the resource_link content block. |
No examples provided.
gribstream_resolve_shared_parameter Resolve shared weather parameter ~162
NO AUTH / PUBLIC / READ-ONLY. Resolves one shared parameter preset for a dataset, returning native variables and expressions to use in /timeseries or /runs request bodies. Use this first for common natural-language concepts such as 2 metre temperature or 10 metre wind instead of guessing dataset-native codes such as TMP. This tool does not execute the request, query weather values, or return forecast data.
| Name | Type | Req | Description |
|---|---|---|---|
| alias | string | – | Optional output alias for the resolved request. |
| dataset | string | – | Optional dataset code to resolve the shared parameter against. |
| parameter | string | yes | Shared parameter code, for example temperature_2m, wind_speed_10m, mean_sea_level_pressure, or wind_speed_500hpa. |
Structured output declared, but exposes no named fields.
No examples provided.
gribstream_validate_request Validate API request ~181
NO AUTH / PUBLIC / READ-ONLY. Validates the basic shape, exact selector tuples, and expression syntax of a proposed GribStream /timeseries or /runs request without sending it. This tool does not execute the request, query weather values, or return forecast data. Use this before returning any hand-edited curl or when changing a request from one dataset to another.
| Name | Type | Req | Description |
|---|---|---|---|
| dataset | string | yes | Dataset code, for example gfs, ifsoper, nbm, hrrr, or urma. |
| endpoint | string | yes | Endpoint to validate. |
| request | object | yes | Request body to validate. Omit asOf unless the user explicitly asks for backtesting, time travel, what was known then, or a historical model-run cutoff for /timeseries. Use request.coordinates for po… |
| Name | Type | Req | Description |
|---|---|---|---|
| dataset | string | yes | Dataset code that was validated. |
| endpoint | string | yes | GribStream endpoint. |
| errors | array | – | Validation errors. |
| timestamp_semantics | string | yes | Endpoint-specific timestamp guidance. |
| valid | boolean | yes | Whether the request body passed local shape, selector, and expression checks. |
| warnings | array | – | Validation warnings. |
No examples provided.
What is the GribStream Weather MCP server?
GribStream Weather MCP is listed in the public MCP registry as com.gribstream/mcp. NOAA and ECMWF weather forecast MCP for discovery, validation, and GribStream OAuth queries. This page covers its hosted endpoint (https://gribstream.com/mcp).
Is the GribStream Weather MCP server safe to use?
GribStream Weather MCP scores 81 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the GribStream Weather MCP server expose?
GribStream Weather MCP exposes 12 tools: gribstream_build_runs_request, gribstream_build_timeseries_request, gribstream_get_dataset, gribstream_get_expression_reference, gribstream_get_parameter, and 7 more. Their descriptions and schemas cost roughly 3,685 tokens of context every time the server is loaded.
Does the GribStream Weather MCP server require authentication?
No. We connected to GribStream Weather MCP without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the GribStream Weather MCP server still maintained?
GribStream Weather MCP is still listed as active in the MCP registry. We last reached this channel on 22 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.