Environment variable READ_ONLY
No value of this variable is held in this registry. The registry knows only the name the source states.
Entries naming READ_ONLY as an ordinary environment variable
| Keycloak Admin | io.github.mrz1880/mcp-keycloak-admin | Administer Keycloak via its Admin REST API: users, roles, clients, groups, IdP, events. |
|---|---|---|
| Microsoft 365 Admin | io.github.okapi-ca/ms-365-admin | Microsoft 365 administration via Graph API application permissions (read-only by default). |
| SendGrid MCP Server | io.github.deyikong/sendgrid-mcp | MCP server for SendGrid's v3 API: email marketing, transactional mail, templates, and analytics. |
| SendGrid Transactional | io.github.Neschadin/sendgrid-mcp | SendGrid transactional email: preflight send, templates, and delivery diagnostics. |
| weeek-mcp in namespace io.github | io.github.YOLKINS/weeek-mcp | Local MCP server for Weeek (stdio transport) — read-only by default, opt-in write tools. |
| clio-mcp in namespace io.github | io.github.oktopeak/clio-mcp | Connect Claude to Clio: 34 tools for matters, custom fields, notes, documents, folders, billing. |
| db-gateway in namespace io.github | io.github.sijunkim/db-gateway | 145+ tools across 8 databases: MySQL, PostgreSQL, Redshift, MongoDB, Redis, Kafka, and more |
Start of the description from the source registry (first sentence, at most 160 characters), untranslated and unverified
Entries naming READ_ONLY as a secret required variable
No entry.
What the sources write about this name
| Keycloak Admin | When true, write and destructive tools are not registered. |
|---|---|
| Microsoft 365 Admin | Set to 'true' or '1' to force read-only mode (default behavior; mutations require --allow-writes). |
| SendGrid MCP Server | When true (the default), blocks all write/delete operations at runtime while keeping every tool registered and visible. |
| SendGrid Transactional | When true, send and mutating tools return an error before any SendGrid request |
| weeek-mcp in namespace io.github | Gate for the write tools. Defaults to 'true': a fresh install exposes only the ten read tools. Set to 'false' to additionally expose the five write tools (create/update/move/complete a task, set an MR link) — an explicit operator opt-in, never the default. |
| clio-mcp in namespace io.github | Optional. 'true', '1' or 'yes' leaves the nine write tools (create_matter, create_note, create_task, update_task, complete_task, create_calendar_entry, log_time_entry, create_activity, upload_document) unregistered so Claude can read Clio but never change it. Works on both transports. |
| db-gateway in namespace io.github | Set to true to hide every write tool and restrict *_execute_query to SELECT-style statements. Recommended when pointing at production. |
Taken verbatim from the source, one line per entry. The text is a vendor's own statement and is neither checked nor shortened.
To the environment variable index
Version of the extraction rule: 1.1. The names are formed by splitting the stored original data at the separator this registry set when reading it in. Counted across the 41,867 published entries.
tracevero · https://tracevero.com/variable/READ_ONLY