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MCP server report

Drillr MCP server

ai.drillr/drillr

We checked this server on 2 November 2026 with McpStamp Check engine 1.2.0. It scored 93 of 100 (grade A), higher than 68.0% of the 33,003 registry servers that responded over HTTPS that day. Ready for Gemini and MCP Registry. Not ready for Claude and ChatGPT.

Measured facts

Score
93A
Sign-in
OAuth
Tools listed
10
Protocol version
2025-11-25
Stores

Store readiness

StoreStatusReason
Claude Connectors Directory Not ready Blocked by Resource metadata "resource" equals the server URL and Human-readable title on every tool.
ChatGPT app directory Not ready Blocked by Human-readable title on every tool.
Gemini Connected Apps Ready No blocking check failed.
Official MCP Registry Ready No blocking check failed.

MCP Registry ready means a valid public remote for the registry, not that the server is listed in a store.

Fixes

3 checks to fix

  1. Fails

    Human-readable title on every tool

    tool_titles

    Blocks Claude and ChatGPT.

    Measured 10/10 without title: filing_list, filing_search, company_search, ticker_lookup, run_sql and 5 more

    Add a short human-readable "title" to every tool (shown in store UIs and consent screens).

  2. Fails

    Resource metadata "resource" equals the server URL

    auth_resource

    Blocks Claude.

    Measured resource https://gateway.drillr.ai is not the server URL https://gateway.drillr.ai/mcp/data

    Serve metadata whose "resource" is exactly https://gateway.drillr.ai/mcp/data (Claude requires an exact match, path included), e.g. at /.well-known/oauth-protected-resource/mcp/data.

  3. Warning

    JSON-RPC error for unknown method

    jsonrpc_errors

    Measured HTTP 401 instead of a JSON-RPC error

    Route the method first and answer unknown methods with JSON-RPC error -32601 before the auth check, or return a JSON-RPC error body with the 401.

24 checks passed

Passed. Served over HTTPS, initialize over Streamable HTTP, Supported protocol version negotiated, JSON or SSE response Content-Type, GET answers SSE or 405, initialize latency, serverInfo name and version, Server instructions, tools capability declared, Sign-in method the store supports (OAuth or none), 401 carries WWW-Authenticate resource_metadata, Protected resource metadata (RFC 9728), Authorization server metadata (RFC 8414 / OIDC), First metadata URL Gemini tries answers 200 with the required fields, issuer equals the authorization_servers entry; token_endpoint_auth_methods_supported (ChatGPT), PKCE S256 advertised, Client registration (DCR or Client ID Metadata Documents), refresh_token grant advertised, tools/list returns tools, inputSchema is an object schema, Tool names are valid and portable, readOnlyHint or destructiveHint on every tool, Explicit readOnlyHint, destructiveHint and openWorldHint (ChatGPT), Tool descriptions.

Run a fresh check

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McpStamp score for Drillr

Markdown

[![McpStamp score](https://www.mcpstamp.com/badge?url=https%3A%2F%2Fgateway.drillr.ai%2Fmcp%2Fdata)](https://www.mcpstamp.com/r/ai-drillr-drillr/)

HTML

<a href="https://www.mcpstamp.com/r/ai-drillr-drillr/"><img src="https://www.mcpstamp.com/badge?url=https%3A%2F%2Fgateway.drillr.ai%2Fmcp%2Fdata" alt="McpStamp score" height="20"></a>
Registry entry

About this server

Financial data and research MCP for US/CN/JP equities: filings, statements, ownership, signals.
Registry name
ai.drillr/drillr
Remote URL
https://gateway.drillr.ai/mcp/data
Version
2.3.0
Source
github.com/Little-Grebe-Inc/drillr-mcp-server
Website
drillr.ai/docs/mcp?ref=mp_registry
Checked
2 November 2026, engine 1.2.0, no credentials

The description above is the server's own text from the official MCP Registry. If a result looks wrong, run a fresh check and email support@zovo.one with the report link.

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