Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Changed the definition of "get_goldback_rate", "get_observed_premiums", "get_price_history" and 2 more
{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Goldback exchange rate"}
⟨11 unchanged words⟩ , nickel and Goldback, observed from marketplace listings.Goldbacks use the Goldback reference rate instead of contained-gold spot and are excluded from ordinary gold statistics.
{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Observed premiums over spot"}
Daily historical series for charting — one metal,the Goldback,orone PCGS-numbered coin at onethegrade.Goldback.
{"$schema":"https://json-schema.org/draft/2020-12/schema","anyOf":[{"additionalProperties":false,"properties":{"base":{" ⟨113 unchanged words⟩ required":["metal"],"type":"object"},{"additionalProperties":false,"properties":{"cursor":{"description":"Opaque continuation token returned by the same tool with exactly the same filters.","maxLength":2048,"minLength":1,"type":"string"},"days":{"default":90,"description":"How many trailing days of history to return.","maximum":3650,"minimum":1,"type":"integer"},"gradeNo":{"description":"PCGS/Sheldon grade for the pcgsNumber series.","maximum":70,"minimum":1,"type":"integer"},"limit":{"default":90,"maximum":100,"minimum":1,"type":"integer"},"pcgsNumber":{"description":"PCGS coin number for a graded-coin series.","minimum":1,"type":"integer"},"plusGrade":{"default":false,"type":"boolean"}},"required":["pcgsNumber","gradeNo"],"type":"object"}]}
{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Spot metal prices"}
⟨6 unchanged words⟩ `currency`/`base` parameter accepts — ISO 4217 fiat plusBTC andthe metal codes.
{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Supported currency catalog"}
Certificate recorded, valid to 2026-12-08
Authorization not required
First tool surface recorded: 5 tools (server version 1.4.0)
Showing the latest 4 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
⟨62 unchanged words⟩ ,"type":"integer"},"series":{"oneOf":[{"additionalProperties":false,"properties":{"kind":{" ⟨17 unchanged words⟩ ","metal"],"type":"object"},{"additionalProperties":false,"properties":{"gradeNo":{"maximum":70,"minimum":1,"type":"integer"},"kind":{"const":"pcgs","type":"string"},"pcgsNumber":{"minimum":1,"type":"integer"},"plusGrade":{"type":"boolean"}},"required":["kind","pcgsNumber","gradeNo","plusGrade"],"type":"object"}]},"startDate":{"format":"date","type":"string"},"unit":{"enum":["troy_oz","goldback","coin"],"type":"string"}},"required": ⟨118 unchanged words⟩ ,"type":"integer"},"series":{"oneOf":[{"additionalProperties":false,"properties":{"kind":{" ⟨17 unchanged words⟩ ","metal"],"type":"object"},{"additionalProperties":false,"properties":{"gradeNo":{"maximum":70,"minimum":1,"type":"integer"},"kind":{"const":"pcgs","type":"string"},"pcgsNumber":{"minimum":1,"type":"integer"},"plusGrade":{"type":"boolean"}},"required":["kind","pcgsNumber","gradeNo","plusGrade"],"type":"object"}]},"startDate":{"format":"date","type":"string"},"unit":{"enum":["troy_oz","goldback","coin"],"type":"string"}},"required" ⟨15 unchanged words⟩
{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Historical price series"}