MCP server exposing 5 tools for pcaob.
This URL is a JSON-RPC 2.0 endpoint over HTTP. Issue POST requests with a JSON-RPC body. Browsers and search crawlers land here on GET.
POST https://gateway.pipeworx.io/pcaob/mcp
Content-Type: application/json
{"jsonrpc":"2.0","id":1,"method":"tools/list"}pcaob_auditor_of — Which PCAOB-registered firm audits a company, and which engagement partner signed the most recent audit report — resolves a ticker or company name to SEC CIK first, then falls back to a name search in our own PCAOB Form AP index if the company has no clean SEC ticker (funds, broker-dealers). Returns firm name/id, engagement partner, audit report date and fiscal period end. Use for "who audits Apple", "Tesla's audit engagement partner".pcaob_firm_engagements — Every issuer a PCAOB-registered audit firm reported auditing via Form AP, optionally scoped to one fiscal year. Give a firm name ("Ernst & Young", "Deloitte") or its numeric PCAOB Firm ID. Use for "every issuer audited by Deloitte in 2025", "how many public companies does BDO audit".pcaob_partner_engagements — Every issuer a named engagement partner signed for, per Form AP. Give a last name (and optionally first name) — matches are partial. Use for "what companies has [partner name] audited".pcaob_auditor_changes — Issuers whose most recent Form AP filing names a DIFFERENT audit firm than their prior filing, where the new filing landed in the last N days — the "who switched auditors recently" aggregation, which no upstream PCAOB page offers directly. Scans issuers with a Form AP filing in the window (capped at 1500 issuers per call) and compares each against its own filing history.pcaob_inspection_reports — PCAOB inspection history for an audit firm: report year, Part I.A deficiency rate, audits reviewed, and a link to the PDF report. Give a firm name (partial match ok). Use for "has PCAOB found deficiencies at Deloitte", "KPMG PCAOB inspection history".Code samples (curl / TypeScript / one-click client install), schemas, and the live playground are on the pack page:
https://pipeworx.io/packs/pcaob/
Pipeworx is an open MCP gateway connecting AI agents to live data. pipeworx.io