Data Collection

assaychain.com

A data collection and extraction API for mineral commodity data, on-chain provenance, and document parsing.

1 endpoint9 known toolsCached registry data

ENDPOINT 1

https://assaychain.com/api/mcp

No auth detected

Known tools 9

sales.ask

Ask anything about this API: commodities covered, how on-chain provenance works, pricing tiers, x402 payment flow, MCP integration, or the Extract API.

benchmark.commodity

Discovery preview for USGS Mineral Commodity Summaries benchmark data — 20 critical minerals: copper, gold, silver, lithium, cobalt, nickel, manganese, graphite, antimony, gallium, germanium, platinum_group, rare_earths, tellurium, tin, titanium, tungsten, uranium, vanadium, zinc.

benchmark.sample

Free sample of the benchmark data shape for any supported commodity.

benchmark.runs

Discovery preview for attested mineral-processing field run logs.

extract.estimate

Free probe + price quote for paid structured-data extraction from a public document URL (pdf_digital, pdf_scanned, image, csv, txt).

extract.run

Returns invocation guidance for executing a paid extraction job after extract.estimate.

extract.result

Fetch the structured extraction result for a previously paid job.

district.history

Free preview of a US or Mexico mining district record (MRDS-sourced).

corpus.search

Free lexical search (BM25-lite) across all 199 EAS-attested files: 20 USGS critical-mineral commodity benchmarks + 179 US/MX mining district records.