Official MCP RegistryListed
Topology Index
Reference for multi-agent LLM topologies: patterns, aliases, sources, starters; one gated report.
First seen 2 Oct 2026. Evidence as of 4 Oct 2026.
6
Tools
From an anonymous probe
1
Source listings
Each with its own history
7
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| fetch | Returns the Markdown document of any public page, exactly as HTTP serves it, from a root-relative path (/patterns/supervisor.md) or a https://topologyindex.com URL. Private tenant routes are not reachable here. A pattern, starter or formation read may add a second item containing a one-time use ticket and an instruction to call `report_outcome` after applying it; pattern and starter redemptions can return indexed pitfalls, checks or a pairing suggestion. | Read-only |
| get_pattern | One pattern page (/patterns/{pattern}.md): definition, aliases, when it is hypothesised to fit, failure modes, sources and whether this deployment can execute it. Accepts a pattern identifier or a known alias. Adds a second item with a one-time use ticket and a one-line instruction when this selected read is eligible; `report_outcome` returns useful indexed follow-up after redemption. | Read-only |
| list_patterns | The decision guide: where to start by the shape of the task, the pattern to consider next and when to avoid each, plus the pattern families (the `choosing` rows of /patterns/index.md, without the rest of that page). With a family, /patterns/index.md?family={family}: that family’s patterns and the rows that name them. With a domain, /domains/{domain}.md: the task shapes common in that kind of work, their rows, the sources of the published findings tagged with it (never a ranking; each finding in words at /domains/{domain}/findings.md) and its starters. The response includes exact next calls for the listed patterns and starters. | Read-only |
| list_starters | The starter formation index (/starters/index.md): unvalidated, unsigned FORMATION.md documents to copy and register privately. With a task class, only the starters that declare it (/starters/index.md?task_class={task_class}). The response includes exact fetch calls for the starter paths. | Read-only |
| report_outcome | Limited rollout: only for a use ticket from a pattern, starter or formation read. If you have no ticket, do not call it. With one, report once after your task: `worked`, `partly` or `did_not_work`, with an optional short note. The response returns a useful follow-up from indexed content when one exists. No prompt, code or log is stored. Terms: /docs/api/contributing.md. | Changes data |
| search | Keyword search, with common synonyms, over pattern names, aliases and families, the decision guide, the domains, sources and benchmarks of published findings, research, starters and guides. At most 10 results, each a path for `fetch`; canonical pattern results also include the identifier for `get_pattern` and an exact next call. If no page matches every word, pages matching some; if none, the decision guide. Matches text only; never ranks patterns. | Read-only |
Change history
- search: input schema changed
- search: description changed (+"canonical pattern results also include the identifier for `get_pattern` and an exact next call. If" -"if")
- list_starters: input schema changed
- list_starters: description changed (+"The response includes exact fetch calls for the starter paths.")
- list_patterns: input schema changed
- list_patterns: description changed (+"The response includes exact next calls for the listed patterns and starters.")
- server instructions changed (+"for a pattern identifier or `fetch` for a page path," +"`list_starters` for starter choices. Discovery answers include exact next calls." -"`list_starters`.")
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | com.topologyindex/topology-index | 2 Oct 2026 | 3 Oct 2026 | 1 |