# score.lastseen.dev
The scoring service of the lastseen.dev family. Built on the lastseen.dev register (the longitudinal notary) as its data substrate. Serves FACT endpoints (schema_history, dependency_risk) and a derived trust_score with a public methodology. Separate service, separate terms.

## API — copyable examples (real, filled-in)
# REST (GET, no key):
curl https://score.lastseen.dev/v1/trust_score/mcp/io.github.06ketan/medium-ops
curl https://score.lastseen.dev/v1/schema_history/mcp/io.github.06ketan/medium-ops
curl https://score.lastseen.dev/v1/dependency_risk/mcp/io.github.06ketan/medium-ops
# MCP (streamable HTTP, JSON-RPC POST to /mcp):
curl -X POST https://score.lastseen.dev/mcp -H 'Content-Type: application/json' -H 'Accept: application/json, text/event-stream' -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"trust_score","arguments":{"id":"io.github.06ketan/medium-ops"}}}'
# trust_score carries depth bound into the number, e.g. display '80 · depth 2/5 · provisional'.
## Machine surfaces (all served; listed here so they need not be guessed)
# https://score.lastseen.dev/openapi.json — OpenAPI 3.1 schema for every REST endpoint (served, was undeclared until 09-01)
# https://score.lastseen.dev/docs — human-readable API reference rendered from that schema
# https://score.lastseen.dev/redoc — the same schema as a reference document (alternative rendering)
# https://score.lastseen.dev/mcp — MCP streamable HTTP endpoint (JSON-RPC over POST; GET is 405 per spec)
# https://score.lastseen.dev/prices.json — published free-tier limits + the S1 floor promise; charging_status is NONE
# https://score.lastseen.dev/healthz — liveness + schema_version + read-contract version
# https://score.lastseen.dev/sitemap.xml — the human pages of this service
## Human pages
# https://score.lastseen.dev/
# https://score.lastseen.dev/methodology
# https://score.lastseen.dev/separation
# https://score.lastseen.dev/terms
## CLI (dependency mortality — sibling tool on the register)
# npm package lastseen-cli: `npx lastseen-cli check` reads ./package.json and checks every
# dependency's dated state against the lastseen.dev register (no key). This score service adds a
# trust_score ON TOP of that record — the CLI reads the register's facts, this endpoint values them.
## Report — State of the Agent Economy, Q3 2026
# Nearly 1 in 3 public MCP servers is dead or no longer maintained (1 in 5 fully dead); 1,027
# changed a tool's schema under a stable name; 98% still speak an older protocol; of 3,510
# observed dead, only 6 returned. Full report: https://lastseen.dev/reports/soae-q3-2026/full