A claims memory for agents: assert beliefs, let them decay, surface contradictions.
Quick Install
Automated & IDE SetupCopy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.
One-click editor setup isn’t available for this listing yet — we don’t have a confirmed install command, and we’d rather show nothing than point your editor at the wrong package or host. Follow the project’s own setup instructions, linked above.
Manual Client & Custom JSON ConfigExpand JSON â–¾
No confirmed setup config for this listing yet. We only publish a config block when the install details come from the project itself — its README, its docs, or a verified owner. We haven’t found those for claims-mcp, and we’d rather show nothing than a guess you’d paste into your client. Follow the project’s own setup instructions for the current steps.
Documentation Overview
claims-mcp
A small memory for agents that treats what it knows as claims that age. You assert a claim about an entity ("acme is priority #1", "the launch is on track"), each claim decays on a half-life set by how volatile it is, and the server tells you which claims have gone stale and which contradict each other.
It is a stdio MCP server plus a CLI over one local SQLite file. No network, no accounts.
Runtime: Bun. v0 uses
bun:sqlite, so it runs on Bun ≥ 1.1, not plain Node. A Node build (node:sqlite) is a possible follow-up.
Model
| Field | Meaning |
|---|---|
entity | What the claim is about (free text key). |
kind | priority (may carry assertedRank), status, fact, relationship. |
volatility | stable (half-life 365d), slow (30d), volatile (7d). |
confidence | 0..1 at last confirmation. Effective confidence halves every half-life since lastConfirmed, floored at 0.05. |
state | active, stale, contradicted, retired. Only active claims are checked. |
A claim's identity is (entity, kind, claim): asserting it again updates it rather than duplicating.
MCP tools
| Tool | Does |
|---|---|
claim_add | Assert or update a claim. |
claim_search | Case-insensitive substring search over claim text and entity. |
claim_confirm | Re-confirm now: resets decay, reactivates, optionally sets confidence. |
claim_retract | Retire a claim. |
claims_contradictions | Conflicts among active claims: duplicate-rank (two entities claim the same priority rank), status-conflict (several active status claims for one entity). Pass observed weekly ranks to also get rank-drop: an asserted-priority entity that every signal ranks worse than rank + 2 for 3 valid periods. |
claims_decayed | Active claims past a staleness threshold (default 0.5), stalest first. |
Resource: claims://all (every claim as JSON).
observed is { "signals": [{ "<entity>": [rank_now, rank_1_period_ago, ...] }, ...], "validPeriods": [true, ...] }. You supply the observations (commit counts, time spent, anything you can rank); the server does not collect them.
Use
Add to an MCP client (Claude Code shown):
The database lives at ~/.claims-mcp/claims.db; override with --db <path> or CLAIMS_MCP_DB.
CLI:
Development
Set AUDIT_TERMS="name1|name2" to add your own private names to the audit.
Provenance
Not a straight extraction. The decay curve and the rank-drop rule are ported from a personal agent memory (rank-drop now takes caller-supplied observations); the duplicate-rank and status-conflict rules are new claim-vs-claim logic written for this package. It shares no code, data or storage with the original.
Author
Built by Diego González Zapiain at Lojik Labs. Listed on the official MCP Registry as io.github.dgonzap30/claims-mcp.
Licence
MIT
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