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82 lines
2.6 KiB
Markdown
82 lines
2.6 KiB
Markdown
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# sh-mcp-finance
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Finance-tier Sea Haven MCP server. Exposes the **finance** tool registry
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(qbo `search_vendors`, payments `lookup_payment_by_*` — see `docs/design.md §3`)
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over the same two interfaces as `sh-mcp-ops` (MCP Streamable HTTP + OpenAPI 3.1),
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through the same shared dispatch path.
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Finance is **sensitive, read-only, and fully audited**: every tool call emits a
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structured audit record and the response is redacted on egress (bank account /
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routing / card / SSN / tax-id masked) before it leaves the server
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(`docs/design.md §2.5, §7.3`).
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## Run locally (no AWS, no Cognito)
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```bash
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npm install
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npm run build
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SH_MCP_ENV=local PORT=8082 npm run start -w @sh-mcp/server-finance
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# or: SH_MCP_ENV=local npm run dev -w @sh-mcp/server-finance
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```
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### Endpoints
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Identical shape to `sh-mcp-ops`: `GET /healthz`, `GET /openapi.json` (both
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unauthenticated), `POST /mcp`, and `POST /tools/:name` (both authenticated).
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### Dev bearer tokens (local only)
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| Token | Identity | Scopes |
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| ------------------- | -------------------------- | ------------------------------------------- |
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| `dev-finance` | accounting@seahavenind.com | `ops:read`, `finance:read` |
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| `dev-finance-admin` | adam@seahavenind.com | `ops:read`, `finance:read`, `finance:admin` |
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Ops-tier tokens (`dev-ops-only`, `dev-assistant`) are **rejected** by this server
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(audience binding).
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### Sample curl — redaction on egress
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```bash
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TOKEN=dev-finance
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curl -s -X POST localhost:8082/tools/lookup_payment_by_vendor \
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-H "Authorization: Bearer $TOKEN" -H 'Content-Type: application/json' \
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-d '{"vendor":"Harbor"}' | jq
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# → bankAccountNumber / bankRoutingNumber / cardNumber are "[REDACTED]";
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# vendor, amount, invoice number are intact.
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```
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Each call writes one structured audit line to stdout (CloudWatch in Lambda):
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```json
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{
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"kind": "audit",
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"sub": "...",
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"tool": "lookup_payment_by_vendor",
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"argsHash": "<sha256>",
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"decision": "allow",
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"result": "ok",
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"ts": "..."
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}
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```
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Args are **hashed, never logged raw** — secrets never reach the audit log.
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### MCP Inspector
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Point it at `http://localhost:8082/mcp` (Streamable HTTP) with
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`Authorization: Bearer dev-finance`.
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## Environment
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Same as `sh-mcp-ops` plus `PAYMENTS_TABLE` (aws mode). Finance additionally
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applies the **15-minute TTL ceiling** on `finance:*` tokens in `aws` mode
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(`docs/design.md §2.5`). `aws` mode is not runtime-exercised in Phase 1.
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## CDK
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`cdk/app.ts` is a **synth-only** placeholder (no real IAM/Cognito/WAF) — the
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finance least-privilege role and audit wiring land in a later phase behind the
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mandatory IAM cross-review.
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