
GEML — a plain-text document format built to be edited in place, one section at a time
One section in, one section out — on Markdown/GEML files, bad writes refused.
- GitHub stars
- 31
- tools
- 9
- transport
- STDIO, HTTP
- last updated
- Nov 10, 2026
Install
From registry metadata$ npx add-mcp https://geml-mcp.supermarket.workers.dev/mcp --name gemlRun in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.
Review the command, arguments and environment values before installing. MCP servers run with your local permissions.
Other ways
Claude Code
$ claude mcp add --transport http geml https://geml-mcp.supermarket.workers.dev/mcpRun in your terminal. Add --scope user to make it available in every project.
Tools
Verified live · 9 toolsVerified live against the running server on Nov 6, 2026.
geml_listList every addressable block in a GEML document — its address, kind and heading text — in one call, with no paging. Call this FIRST: what it returns is what every other tool here addresses, and it is cheaper and more reliable than reading the file to see what is in it. Rows ma...3 params
List every addressable block in a GEML document — its address, kind and heading text — in one call, with no paging. Call this FIRST: what it returns is what every other tool here addresses, and it is cheaper and more reliable than reading the file to see what is in it. Rows ma...
namestringsource*stringwithinstringgeml_findSearch block CONTENT in the document; each hit is one `<name>\t<address>` row. geml_list says what a document contains, this says which block holds the words — as an address that pastes straight into geml_get or geml_set, not a line number the next edit invalidates. The addres...6 params
Search block CONTENT in the document; each hit is one `<name>\t<address>` row. geml_list says what a document contains, this says which block holds the words — as an address that pastes straight into geml_get or geml_set, not a line number the next edit invalidates. The addres...
casebooleanheadbooleannamestringpattern*stringsource*stringwithinstringgeml_getRead ONE block from a GEML document instead of the whole file: only that block comes back, typically a few percent of the document. Pass the `address` geml_list prints as `id` — it also reaches blocks with no `#id`; to locate a block by its words instead, use geml_find first....6 params
Read ONE block from a GEML document instead of the whole file: only that block comes back, typically a few percent of the document. Pass the `address` geml_list prints as `id` — it also reaches blocks with no `#id`; to locate a block by its words instead, use geml_find first....
id*stringnamestringpartstringwhole · head · intro · bodysource*stringviewbooleanwithinstringgeml_checkValidate a GEML document without changing it: returns every diagnostic with a stable `code`, a severity and a line, and an empty list means the document is valid. Use it to confirm a document is sound before reporting work as finished. Every write through this server runs the...2 params
Validate a GEML document without changing it: returns every diagnostic with a stable `code`, a severity and a line, and an empty list means the document is valid. Use it to confirm a document is sound before reporting work as finished. Every write through this server runs the...
namestringsource*stringgeml_toConvert a WHOLE document and get the result back as text — the read half of the CLI's `geml <file> --to <fmt>`. `to: "geml"` on a Markdown file is the importer, the one thing the block tools cannot do; `to: "md"` projects a GEML document out (lossy); `to: "json"` returns the f...4 params
Convert a WHOLE document and get the result back as text — the read half of the CLI's `geml <file> --to <fmt>`. `to: "geml"` on a Markdown file is the importer, the one thing the block tools cannot do; `to: "md"` projects a GEML document out (lossy); `to: "json"` returns the f...
fromstringgeml · md · jsonnamestringsource*stringtostringjson · md · geml · htmlgeml_setReplace ONE block and leave every other byte untouched — prefer this to rewriting a file. For content that does not exist yet use geml_add; to remove a block, geml_delete. The replacement is validated before it is written: if it would break the document, nothing is written and...5 params
Replace ONE block and leave every other byte untouched — prefer this to rewriting a file. For content that does not exist yet use geml_add; to remove a block, geml_delete. The replacement is validated before it is written: if it would break the document, nothing is written and...
body*stringid*stringnamestringpartstringwhole · head · intro · bodysource*stringgeml_addInsert new content — one or more blocks, or prose — at the end of the document (`position: append`) or before/after the block named by `anchor`. Use this for content that does not exist yet; to change a block that does, use geml_set. Ids inside the content are kept. In a `.md`...5 params
Insert new content — one or more blocks, or prose — at the end of the document (`position: append`) or before/after the block named by `anchor`. Use this for content that does not exist yet; to change a block that does, use geml_set. Ids inside the content are kept. In a `.md`...
anchorstringcontent*stringnamestringposition*stringappend · before · aftersource*stringgeml_deleteRemove one or more blocks, each named by an id or any address geml_list prints; a filter (`=== type`, `{key=value}`) removes every block it matches. Each block takes the blank line that separated it from its neighbours, so deleting what geml_add inserted leaves the file as it...3 params
Remove one or more blocks, each named by an id or any address geml_list prints; a filter (`=== type`, `{key=value}`) removes every block it matches. Each block takes the blank line that separated it from its neighbours, so deleting what geml_add inserted leaves the file as it...
ids*arraynamestringsource*stringgeml_renameRename a block id AND every reference to it in the same document, in one id-boundary-safe write. Use this rather than geml_set or a text search-and-replace, which would also hit ids that merely share a prefix. A Markdown heading's anchor is its text, so it is renamed by changi...4 params
Rename a block id AND every reference to it in the same document, in one id-boundary-safe write. Use this rather than geml_set or a text search-and-replace, which would also hit ids that merely share a prefix. A Markdown heading's anchor is its text, so it is renamed by changi...
namestringnew*stringold*stringsource*stringSponsors
Readme
Details
- Repository
- github.com/geml-spec/geml
- Website
- geml-spec.github.io
- Category
- Documents & Knowledge
- Package
@geml/geml- Transport
- STDIO, HTTP
- Registry
- MCP registry, active
- Tools verified
- Nov 6, 2026