mcp-server-wise

@aiwerk/mcp-server-wise

Wise (TransferWise) Personal API MCP server. Read-only: profiles, balances, rates, transfers, recipients.

Tools (v0.1.4, 11 read-only)

• wise_list_profiles, wise_get_profile
• wise_list_balances, wise_get_balance
• wise_get_exchange_rate, wise_get_exchange_rate_history
• wise_list_transfers, wise_get_transfer
• wise_list_recipients, wise_get_recipient, wise_get_account_requirements

Write tools (create/fund/cancel transfer, create/delete recipient, create quote) are intentionally not in v0.1.x — they require idempotency + SCA state-machine handling, planned for v0.2.0.

Configuration

| Env var | Required | Default | Purpose | |---|---|---|---| | WISE_API_TOKEN | yes | — | Personal API token from https://wise.com/settings/api-tokens | | WISE_API_BASE_URL | no | https://api.wise.com | Sandbox override: https://api.sandbox.transferwise.tech | | WISE_API_TIMEOUT_MS | no | 30000 | Per-request timeout | | WISE_API_ALLOW_UNSAFE_BASE_URL | no | — | Dangerous override — see below |

Base URL safety

WISE_API_BASE_URL is locked down by default:

• Must use https://
• Host must be on the allowlist: api.wise.com or api.sandbox.transferwise.tech

Violation throws WiseConfigError before any Bearer token leaves the machine. This prevents token exfiltration via a misconfigured env, a bad CI value, or a malicious override.

Dangerous override: set WISE_API_ALLOW_UNSAFE_BASE_URL=1 to bypass both checks (allow http:// and arbitrary hosts). Only use for local testing against a mock server. Never enable this in production or with a real Wise token. The token will be sent to whatever host you configure.

Install

Two ways to run this server — pick the one that fits.

Option 1 — Hosted (zero setup)

No local runtime, no env vars on your machine — your Wise token is AES-256-GCM encrypted server-side via HashiCorp Vault.

1. Sign up at aiwerkmcp.com.
2. Install Wise from the catalog and paste your WISE_API_TOKEN.
3. Point your MCP client (Claude.ai, Cursor, Hermes, …) at your hosted endpoint:

   https://bridge.aiwerk.ch/u/<your-user-id>/mcp

with your Bearer token.

All 11 read-only tools appear. Install other AIWerk recipes from the same bridge.

Option 2 — Self-hosted (npx)

Run directly — you manage the token:

WISE_API_TOKEN=xxx npx @aiwerk/mcp-server-wise

Or install globally:

npm install -g @aiwerk/mcp-server-wise
WISE_API_TOKEN=xxx mcp-server-wise

Error taxonomy

Errors surface as MCP isError: true responses with distinct prefixes:

• Timeout: … — request exceeded WISE_API_TIMEOUT_MS (wraps AbortController)
• Network error: … — fetch rejected (DNS, connection reset, etc.)
• Configuration error: … — missing token or invalid base URL
• Wise API error <status> … — HTTP 4xx/5xx response from Wise

Typical flow

1. wise_list_profiles → pick profileId
2. wise_list_balances({profileId}) → see available currencies / amounts
3. wise_get_exchange_rate({source, target}) → check rate
4. wise_list_transfers({profileId, status}) → history / status lookup

Build / dev notes

• src/version.ts is generated from package.json by scripts/gen-version.mjs (runs as prebuild / predev / pretest). The file IS committed so a fresh clone compiles immediately.
• The generator is idempotent: it only writes when the version actually changes. So npm run build on an in-sync tree leaves the working copy clean.
• Bumping package.json's version and running any of build / dev / test is enough to propagate — no separate manual step on src/version.ts.

About AIWerk MCP

Part of the AIWerk MCP platform — curated, signed MCP recipes served either as npm packages for self-hosting or through our multi-tenant hosted bridge (bridge.aiwerk.ch).

Other AIWerk MCP servers:

• @aiwerk/mcp-server-cal — Cal.com scheduling
• @aiwerk/mcp-server-imap — IMAP/SMTP email, provider-agnostic
• @aiwerk/mcp-server-clawhub — ClawHub skill catalog

Browse the full catalog (20+ recipes including GitHub, Linear, Notion, Stripe, …) at aiwerkmcp.com.

Licence

MIT © 2026 AIWerk