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\n

@cyanheads/treasury-fiscaldata-mcp-server

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Query US Treasury national debt, interest rates, exchange rates, and fiscal datasets via MCP.\n

8 Tools · dataframe drop is opt-in
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\n\n[![Version](https://img.shields.io/badge/Version-0.2.0-blue.svg?style=flat-square)](./CHANGELOG.md) [![License](https://img.shields.io/badge/License-Apache%202.0-orange.svg?style=flat-square)](./LICENSE) [![Docker](https://img.shields.io/badge/Docker-ghcr.io-2496ED?style=flat-square&logo=docker&logoColor=white)](https://github.com/users/cyanheads/packages/container/package/treasury-fiscaldata-mcp-server) [![MCP SDK](https://img.shields.io/badge/MCP%20SDK-^2.2.0-green.svg?style=flat-square)](https://modelcontextprotocol.io/) [![npm](https://img.shields.io/npm/v/@cyanheads/treasury-fiscaldata-mcp-server?style=flat-square&logo=npm&logoColor=white)](https://www.npmjs.com/package/@cyanheads/treasury-fiscaldata-mcp-server) [![TypeScript](https://img.shields.io/badge/TypeScript-^7.0.2-3178C6.svg?style=flat-square)](https://www.typescriptlang.org/) [![Bun](https://img.shields.io/badge/Bun-v1.4.2-blueviolet.svg?style=flat-square)](https://bun.sh/)\n\n
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\n\n[![Install in Claude Desktop](https://img.shields.io/badge/Install_in-Claude_Desktop-D97757?style=for-the-badge&logo=anthropic&logoColor=white)](https://github.com/cyanheads/treasury-fiscaldata-mcp-server/releases/latest/download/treasury-fiscaldata-mcp-server.mcpb) [![Install in Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=treasury-fiscaldata-mcp-server&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsIkBjeWFuaGVhZHMvdHJlYXN1cnktZmlzY2FsZGF0YS1tY3Atc2VydmVyIl19) [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install_Server-0098FF?style=for-the-badge&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode:mcp/install?%7B%22name%22%3A%22treasury-fiscaldata-mcp-server%22%2C%22command%22%3A%22npx%22%2C%22args%22%3A%5B%22-y%22%2C%22%40cyanheads%2Ftreasury-fiscaldata-mcp-server%22%5D%7D)\n\n[![Framework](https://img.shields.io/badge/Built%20on-@cyanheads/mcp--ts--core-67E8F9?style=flat-square)](https://www.npmjs.com/package/@cyanheads/mcp-ts-core)\n\n
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\n\n**Public Hosted Server:** [https://treasury-fiscaldata.caseyjhand.com/mcp](https://treasury-fiscaldata.caseyjhand.com/mcp)\n\n
\n\n---\n\n## Overview\n\nUS Treasury Fiscal Data — national debt, interest rates, exchange rates, and other fiscal datasets. Browse a curated catalog of 17 endpoints, query any endpoint directly, or stage large pulls as DuckDB dataframes for SQL analysis, from any MCP client. Runs as a stdio process, a local Streamable HTTP server, or the public hosted endpoint above.\n\n### Tools\n\n| Tool | Description |\n|:-----|:------------|\n| `treasury_list_datasets` | Browse the curated catalog of 17 Treasury Fiscal Data endpoints with field names, descriptions, and update cadence |\n| `treasury_query_dataset` | Query any Treasury Fiscal Data endpoint by path, field list, filters, sort, and page — with optional DataCanvas spill |\n| `treasury_get_debt` | Fetch national debt (Debt to the Penny) — latest record, specific date, or date-range series with optional DataCanvas spill |\n| `treasury_get_interest_rates` | Average interest rates Treasury pays on outstanding securities by type — marketable issues, non-marketable series, and aggregate totals |\n| `treasury_get_exchange_rates` | Official Treasury statutory exchange rates for ~165 countries, published quarterly |\n| `treasury_dataframe_describe` | List DataCanvas dataframes materialized by the treasury_* tools with schema, row count, and TTL |\n| `treasury_dataframe_query` | Run a single-statement SELECT against DataCanvas dataframes using standard DuckDB SQL |\n| `treasury_dataframe_drop` | Delete a staged dataframe and its provenance (disabled unless `TREASURY_DATAFRAME_DROP_ENABLED=true`) |\n\n## Capability reference\n\n### `treasury_list_datasets` tool\n\n- Filter by category (`debt`, `interest_rates`, `exchange_rates`, `revenue_spending`, `savings_bonds`, `securities`, `other`) or keyword search.\n- Returns endpoint paths, fields, types, and update cadence from a bundled catalog, with no network call.\n\n---\n\n### `treasury_query_dataset` tool\n\n- Query an endpoint with `{ field, operator, value }` filters (`eq`, `gt`, `gte`, `lt`, `lte`, `in`), sort, and pagination: `page_size` 1–10000 (default 100), `page_number` starts at 1.\n- Returns rows, field labels, `total_count`, and `total_pages`; error reasons are `invalid_endpoint`, `invalid_field`, `invalid_filter`, and `page_out_of_range`.\n- Pass `canvas_id` to stage the page for SQL analysis; the returned `canvas_id` is the assigned table name.\n\n---\n\n### `treasury_get_debt` tool\n\n- `mode=latest` returns the newest business-day record; `mode=date` accepts a YYYY-MM-DD date; `mode=series` accepts a date range. Coverage begins 1993-04-01.\n- Returns debt totals and a 20-row series preview; compare `retrieved_records` with `total_records`. A missing date returns `no_data_for_date`.\n- Series staging starts above 500 rows or on request via `canvas_id`; paging stops at 50,000 rows.\n\n---\n\n### `treasury_get_interest_rates` tool\n\n- `mode=latest` returns the newest month's rates, optionally filtered by `security_type`; `mode=series` accepts a date range.\n- Rates are percentages, with available security types disclosed when a filter matches nothing; the series preview holds at most 20 rows.\n- Series staging starts above 200 rows or on request via `canvas_id`.\n\n---\n\n### `treasury_get_exchange_rates` tool\n\n- Quarterly official reporting rates in foreign currency units per 1 USD. Filter `countries` by exact name; `mode=latest` returns one current row per currency and `mode=series` accepts a date range.\n- Each row carries `record_date` and `effective_date`; `mixed_record_dates` flags a result spanning quarters. Series previews hold 20 rows; `retrieved_records` discloses progress against `total_records`.\n- Series staging starts above 500 rows or on request via `canvas_id`; paging stops at 50,000 rows.\n- `country_not_found` error when a requested country has no records\n\n---\n\n### `treasury_dataframe_describe` tool\n\n- Omit `name` to list the tenant's active dataframes, or supply one exact table name.\n- Returns provenance, created/expiry timestamps, row count, and column schema; `truncated` / `max_rows` disclose a capped source pull.\n- Table expiry defaults to 24h after staging, configurable with `CANVAS_TTL_MS`.\n\n---\n\n### `treasury_dataframe_query` tool\n\n- Accepts one read-only SELECT; `row_limit` defaults to 1000 (max 10000) and `preview` may not exceed it. System catalogs, external-file functions, and SQL mutations are denied.\n- Returns rows and `row_count_capped`; errors distinguish `canvas_unavailable`, `system_catalog_access`, `invalid_sql`, `missing_table`, and `invalid_query_bounds`.\n- `register_as` materializes the full result as a new dataframe with a fresh TTL.\n\n---\n\n### `treasury_dataframe_drop` tool\n\n- Accepts the exact `name` from `treasury_dataframe_describe`, a data tool's `canvas_id`, or query's `registered_as`; deletes that table and its provenance for the tenant.\n- Returns `name` and `dropped: true`; an absent or expired table returns `missing_table` with guidance to list active tables.\n- Disabled by default. Set `TREASURY_DATAFRAME_DROP_ENABLED=true` and `CANVAS_PROVIDER_TYPE=duckdb` to make it callable; the HTTP landing page shows the disabled tool and enable hint otherwise.\n\n## Features\n\nBuilt on [`@cyanheads/mcp-ts-core`](https://github.com/cyanheads/mcp-ts-core): stdio and Streamable HTTP transports, pluggable auth (`none` / `jwt` / `oauth`), swappable storage (`in-memory`, `filesystem`, `Supabase`, `Cloudflare KV/R2/D1`), structured logging with optional OpenTelemetry tracing.\n\nFiscal Data-specific:\n\n- All API values are strings; `\"null\"` means no value. Treasury dataframe columns are VARCHAR — CAST to DECIMAL or DATE for arithmetic and date comparisons. DataCanvas requires `CANVAS_PROVIDER_TYPE=duckdb`; configured canvas tools report `canvas_unavailable` otherwise.\n- Curated catalog of 17 endpoints with field metadata — no discovery round-trip required; pass any endpoint path directly to `treasury_query_dataset` for datasets outside the catalog\n- Convenience tools for the three most-queried datasets — national debt, interest rates, exchange rates\n- DataCanvas integration: large pulls register as `df_` dataframes queryable via DuckDB SQL, with automatic staging thresholds per tool\n- No API key required — the US Treasury Fiscal Data API is free and public\n\nAgent-friendly output:\n\n- Provenance: filter-expression echo (`applied_filters`) and field-label maps (`field_labels`) let agents verify what was sent and read raw field names\n- Enrichment notices: empty-result guidance, partial-country mismatches, canvas staging confirmations, and truncated-series warnings all name the next tool call\n- Graceful truncation: series and query results carry `truncated` / `retrieved_records` / `row_count_capped` fields instead of silently dropping rows\n- Canvas provenance: source tool, original query parameters, row count, and column schema surfaced by `treasury_dataframe_describe`\n\n## Getting started\n\n### Public Hosted Instance\n\nA public instance is available at `https://treasury-fiscaldata.caseyjhand.com/mcp` — no installation required. Point any MCP client at it via Streamable HTTP:\n\n```json\n{\n \"mcpServers\": {\n \"treasury-fiscaldata-mcp-server\": {\n \"type\": \"streamable-http\",\n \"url\": \"https://treasury-fiscaldata.caseyjhand.com/mcp\"\n }\n }\n}\n```\n\n### Self-Hosted / Local\n\nAdd the following to your MCP client configuration file.\n\n```json\n{\n \"mcpServers\": {\n \"treasury-fiscaldata-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"bunx\",\n \"args\": [\"@cyanheads/treasury-fiscaldata-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\"\n }\n }\n }\n}\n```\n\nOr with npx (no Bun required):\n\n```json\n{\n \"mcpServers\": {\n \"treasury-fiscaldata-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"npx\",\n \"args\": [\"-y\", \"@cyanheads/treasury-fiscaldata-mcp-server@latest\"],\n \"env\": {\n \"MCP_TRANSPORT_TYPE\": \"stdio\",\n \"MCP_LOG_LEVEL\": \"info\"\n }\n }\n }\n}\n```\n\nOr with Docker:\n\n```json\n{\n \"mcpServers\": {\n \"treasury-fiscaldata-mcp-server\": {\n \"type\": \"stdio\",\n \"command\": \"docker\",\n \"args\": [\n \"run\", \"-i\", \"--rm\",\n \"-e\", \"MCP_TRANSPORT_TYPE=stdio\",\n \"ghcr.io/cyanheads/treasury-fiscaldata-mcp-server:latest\"\n ]\n }\n }\n}\n```\n\nFor Streamable HTTP, set the transport and start the server:\n\n```sh\nMCP_TRANSPORT_TYPE=http MCP_HTTP_PORT=3010 bun run start:http\n# Server listens at http://localhost:3010/mcp\n```\n\n### DataCanvas SQL workflow\n\nFor large time-series pulls or multi-dataset analysis, use the DataCanvas SQL workflow:\n\n1. **Set `CANVAS_PROVIDER_TYPE=duckdb`** in your server environment.\n2. **Call a data tool with a `canvas_id`** — e.g., `treasury_get_debt` with `mode=series` and a `canvas_id` value, or `treasury_query_dataset` with `canvas_id`. The tool registers the results as a `df_XXXXX_XXXXX` dataframe and returns the table name.\n3. **Inspect the schema** with `treasury_dataframe_describe` — lists column names, types (all VARCHAR for Treasury data), row count, and TTL.\n4. **Query with SQL** via `treasury_dataframe_query` — standard DuckDB SELECT with joins, aggregates, window functions, and CTEs. CAST VARCHAR columns to DECIMAL or DATE for arithmetic.\n\n```sql\n-- Example: debt trend over the last year, month-end records only\nSELECT\n record_date,\n CAST(tot_pub_debt_out_amt AS DECIMAL) / 1e12 AS total_debt_trillions\nFROM df_xxxxx\nWHERE CAST(record_date AS DATE) >= CURRENT_DATE - INTERVAL 1 YEAR\nORDER BY record_date DESC\n```\n\n### Prerequisites\n\n- [Bun v1.4.0](https://bun.sh/) or higher (or Node.js v24+).\n- No API key required — the US Treasury Fiscal Data API is free and public.\n- For DataCanvas SQL: `CANVAS_PROVIDER_TYPE=duckdb` (DuckDB is bundled as `@duckdb/node-api`).\n\n### Installation\n\n1. **Clone the repository:**\n\n```sh\ngit clone https://github.com/cyanheads/treasury-fiscaldata-mcp-server.git\n```\n\n2. **Navigate into the directory:**\n\n```sh\ncd treasury-fiscaldata-mcp-server\n```\n\n3. **Install dependencies:**\n\n```sh\nbun install\n```\n\n4. **Configure environment:**\n\n```sh\ncp .env.example .env\n# edit .env as needed — no required vars; CANVAS_PROVIDER_TYPE=duckdb to enable SQL\n```\n\n## Configuration\n\n| Variable | Description | Default |\n|:---------|:------------|:--------|\n| `CANVAS_PROVIDER_TYPE` | Set to `duckdb` for dataframe describe/query and for drop when enabled. With `none`, callable canvas tools return `canvas_unavailable`; drop stays off the tool list unless separately enabled. | `none` |\n| `CANVAS_TTL_MS` | Per-table TTL for DataCanvas dataframes in milliseconds. | `86400000` (24h) |\n| `TREASURY_DATAFRAME_DROP_ENABLED` | Register `treasury_dataframe_drop` as callable. Also requires `CANVAS_PROVIDER_TYPE=duckdb`. | `false` |\n| `MCP_TRANSPORT_TYPE` | Transport: `stdio` or `http`. | `stdio` |\n| `MCP_HTTP_PORT` | Port for HTTP server. | `3010` |\n| `MCP_SESSION_MODE` | HTTP session handling: `auto`, `stateful`, or `stateless`. Setting it overrides the server's own declaration; leaving it unset falls through to that declaration, not to the schema default. | `stateless` (declared in `src/index.ts`) |\n| `MCP_AUTH_MODE` | Auth mode: `none`, `jwt`, or `oauth`. | `none` |\n| `MCP_LOG_LEVEL` | Log level (`debug`, `info`, `notice`, `warning`, `error`). | `info` |\n| `LOGS_DIR` | Directory for log files (Node.js/Bun only). | `/logs` |\n| `LOG_TOOL_FAILURE_PAYLOADS` | Log failed-call arguments and results, redacted by key name. Secrets inside free-form values are not redacted. | `false` |\n| `LOG_TOOL_FAILURE_PAYLOAD_MAX_BYTES` | Byte cap for each logged failed-call payload. | `16384` |\n| `OTEL_ENABLED` | Enable [OpenTelemetry](https://github.com/cyanheads/mcp-ts-core/tree/main/docs/telemetry) spans and metrics. | `false` |\n| `OTEL_EXPORTER_OTLP_ENDPOINT` | Base OTLP endpoint for traces and metrics. | Unset |\n| `OTEL_EXPORTER_OTLP_LOGS_ENDPOINT` | Explicit OTLP log endpoint; the base endpoint does not enable log export. | Unset |\n\nSee [`.env.example`](./.env.example) for the full list of optional overrides.\n\n## Running the server\n\n### Local development\n\n- **Build and run:**\n\n ```sh\n bun run rebuild\n\n bun run start:stdio\n # or\n bun run start:http\n ```\n\n- **Run checks and tests:**\n\n ```sh\n bun run devcheck # Lint, format, typecheck, security\n bun run test # Vitest test suite\n bun run lint:mcp # Validate MCP definitions against spec\n bun run lint:deps # Detect unused and missing dependencies with Knip\n bun run verify:catalog # Probe every catalog endpoint and field against the live API\n ```\n\n `verify:catalog` makes live Fiscal Data requests and runs separately from `devcheck` and the test suite. Run it after editing `src/services/fiscal-data/datasets.ts` and before a release.\n\n Builds type-check and emit declarations with TypeScript, then use Bun to bundle server code as Node-compatible ESM in `dist/index.js`. Package dependencies remain external, including the framework and DuckDB native bindings. The installed server runs on Node or Bun; building from source requires Bun. Dependency checks use `knip.jsonc` to cover source, scripts, and tests.\n\n### Docker\n\n```sh\ndocker build -t treasury-fiscaldata-mcp-server .\ndocker run --rm -e CANVAS_PROVIDER_TYPE=duckdb -p 3010:3010 treasury-fiscaldata-mcp-server\n```\n\nThe Dockerfile defaults to HTTP transport, stateless session mode, and logs to `/var/log/treasury-fiscaldata-mcp-server`. A native build-host dependency stage cross-installs DuckDB bindings for the target architecture, preserves the release-age and security checks, and removes unused musl bindings. OpenTelemetry peers are installed at the framework's declared ranges — build with `--build-arg OTEL_ENABLED=false` to omit them.\n\n## Project structure\n\n| Directory | Purpose |\n|:----------|:--------|\n| `src/index.ts` | `createApp()` entry point — registers tools and inits services. |\n| `src/config/` | Server-specific environment variable parsing and validation with Zod. |\n| `src/mcp-server/tools/definitions/` | Tool definitions (`*.tool.ts`) — 5 data tools + 3 DataCanvas tools, including opt-in drop. |\n| `src/services/fiscal-data/` | Treasury Fiscal Data API client, embedded endpoint catalog, and types. |\n| `src/services/canvas-bridge/` | Adapter over the framework DataCanvas: `df_` minting, per-table TTL, system-catalog SQL deny. |\n| `tests/` | Unit and integration tests mirroring `src/`. |\n\n## Development guide\n\nSee [`CLAUDE.md`](./CLAUDE.md) and [`AGENTS.md`](./AGENTS.md) for development guidelines and architectural rules. The short version:\n\n- Handlers throw, framework catches — no `try/catch` in tool logic\n- Use `ctx.log` for request-scoped logging, `ctx.state` for tenant-scoped storage\n- All Treasury API values are strings — validate and CAST in downstream SQL; never fabricate missing fields\n- Register new tools via the arrays in `src/index.ts`\n\n## Contributing\n\nIssues are welcome. Run checks and tests before submitting:\n\n```sh\nbun run devcheck\nbun run test\n```\n\n## License\n\nApache-2.0 — see [LICENSE](LICENSE) for details.\n","readmeFilename":"README.md"}