Verified Facts — official thresholds, rates and fees with source, date and signature

https://server.smithery.ai/drchriseames/databutler-facts/mcp

● healthy

Look up an official figure by key and get back the value, its official source URL, the date a human verified it, a fresh/stale flag against your max_age, and an Ed25519 signature you can check against databutler.dev/.well-known/jwks.json. 496 keys: UK tax and benefits, US federal thresholds, German tax and social insurance, EU figures. Tools: get_fact (key + max_age), resolve_fact (plain-language question to key), what_changed_since (facts that changed after a date, e.g. your training cutoff). Open protocol: Verified Facts v0.2.

Transport

streamable-http

Auth

smithery_api_key

Cost

—

Protocol revision

2026-07-28

negotiated, not declared

MCP readiness

B · 89/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 70.0/100), which weighs availability, conformance, p95 speed and descriptor. How the two differ

Valid MCP handshake	10/10	initialize and tools/list both answered.
Live MCP endpoint	24/25	Endpoint answers the MCP initialize handshake (4211 ms); slow response -1.
Protocol revision	10/10	Speaks the current MCP revision 2026-07-28.
Signed descriptor	n/a	No MCP standard defines a signed server descriptor.
Uptime (30 days)	15/15	30/30 probes succeeded over 30 days (100%).
Tool declaration	10/10	Lists 3 tool(s) with descriptions.
Verified identity	5/10	Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Auth declaration	2/5	Declares credential scheme: smithery_api_key.

Applicable criteria total 90 points, scaled to 100.

Responsiveness: Slow (4211 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily MCP probe (initialize + tools/list) and 30-day probe history. No MCP standard defines a signed server descriptor, so that criterion is n/a and the other 90 points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 53,039 reachable MCP servers in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 96% of peers; This listing 89 · peer median 81
Latency: Faster than 20% of peers; This listing 635 ms · peer median 326 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Auth declaration −3 — State how to authenticate (an auth scheme, or that none is needed).
Now: Declares credential scheme: smithery_api_key.
Live MCP endpoint −1 — Answer initialize and tools/list at the declared endpoint.
Now: Endpoint answers the MCP initialize handshake (4211 ms); slow response -1.

How many agent tools actually work · All statistics

Listed in

Directories this entry was found in.

smithery since 2026-10-13 ↗

How to connect

MCP endpoint (streamable-http)

https://server.smithery.ai/drchriseames/databutler-facts/mcp

JSON-RPC initialize probe

curl -X POST https://server.smithery.ai/drchriseames/databutler-facts/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Homepage

https://databutler.dev/

Listed at (smithery)

https://databutler.dev/