Rhumb MCP server

Read from the package source without running it. The installed server may list more.

• budget

  Check or set your call spending limit. Budgets are enforced BEFORE a call — you get HTTP 402 (not a surprise bill) when you'd exceed your limit. Call with no params to check current budget and remaining balance.

• check_balance

  Check your current Rhumb credit balance in USD. Also shows whether auto-reload is enabled. If balance is low, use get_payment_url to top up.

• check_credentials

  Check what credential modes are available to you. Shows: (1) which Capabilities have Rhumb Resolve credentials (ready to call immediately), (2) which Services have ceremony guides (self-provision in minutes), and (3) BYOK status. Start here when you're new to Rhumb or unsure what you can call.

• credential_ceremony

  Get step-by-step instructions to obtain API credentials for a Service. Returns signup steps, expected token format (prefix, pattern), verification endpoint, estimated time, and whether human intervention is needed. Use before calling in agent_vault mode. Call without params to list all Services with available ceremonies.

• discover_capabilities

  Browse Capabilities by domain or search text. A Capability is an action (e.g. 'email.send', 'payment.charge') that multiple providers can fulfill. Use this when you know WHAT you need to do but not which Service does it. Returns Capability IDs for resolve_capability. Different from find_services: find_services searches Services, this searches Capabilities.

• estimate_capability

  Get the cost of a Capability call WITHOUT making the call. Returns cost in USD, circuit health, and endpoint pattern. Default credential mode is auto: Rhumb uses Rhumb Resolve when an active managed config exists, otherwise falls back to byo (BYOK). Always call this before execute_capability for cost-sensitive workflows — no charge for estimates.

• execute_capabilitywrite action

  Call a Capability through Rhumb Resolve. Typical workflow: discover_capabilities → resolve_capability → estimate_capability → execute_capability. Default credential mode is auto: Rhumb uses Rhumb Resolve when an active managed config exists, otherwise falls back to byo (BYOK). Other explicit modes: rhumb_managed — zero-config through Rhumb Resolve when available; byo — BYOK via agent_token + metho

• find_services

  Search indexed Services by what you need them to do. Returns ranked Services with AN Scores. Use this when you know the problem but not which Service to call. For Capability-level search (e.g. 'email.send'), use discover_capabilities instead.

• get_alternatives

  Find alternative Services, ranked by AN Score. Use when a Service doesn't meet your needs or you want to compare options in the same category.

• get_failure_modes

  Get known failure patterns, impact severity, and workarounds for a service. Use BEFORE integrating to write defensive code, or AFTER hitting an error to diagnose it.

• get_ledger

  Get your billing history: charges (debits), top-ups (credits), and auto-reload events. Each entry shows amount, balance after, description, and timestamp. Most recent first.

• get_payment_url

  Get a checkout URL to add credits to your Rhumb balance. Present this URL to a human to complete payment. Credits are available immediately after payment.

• get_score

  Get the full AN Score breakdown for a Service: execution quality, access readiness, autonomy level, tier label, and freshness. Use after find_services to evaluate a specific Service.

• resolve_capability

  Given a Capability ID, returns ranked providers with health status, cost per call, auth methods, endpoint patterns, and fallback chains. This is the core routing decision: 'I need email.send — which provider should I use?' Call this before execute_capability to understand your options.

• routing

  Get or set how Rhumb auto-selects providers when you don't specify one in execute_capability. Controls the tradeoff between cost, speed, and quality. Also sets a quality floor (minimum AN Score) and optional per-call cost ceiling.

• spend

  Get your spending breakdown for a billing period: total USD spent, call count, average cost per call, broken down by Capability and by provider. Use to audit costs or optimize routing.

• Code scan41 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitystatic API keys via environment variables6/15
• Maintenancelast push 0 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Safety score

83/100

higher than 68% of 4,460 AI and agents servers

Tools

16

the typical AI and agents server has 6

Tools that change things

6%

typical: 0%. Fewer write tools means less an agent can break

GitHub stars

4

more than 77% of 2,711 AI and agents servers

Downloads a week

62

more than 50% of 1,538 AI and agents servers with a package

Rhumb: common questions

Is Rhumb MCP server safe?

Mostly: it is graded B (83/100). Read the Rhumb safety report

How do I install Rhumb?

It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.

Does Rhumb need an API key?

Yes. The registry entry asks for RHUMB_API_KEY.

Is Rhumb maintained?

The last commit was 38 days ago (2026-09-27). The latest release is v0.8.2.

What can I use instead of Rhumb?

Servers from other publishers that do the same job: Decionis MCP server, Alibaba Cloud DashScope — Qwen MCP server and freellmpool MCP server.

How does Rhumb compare with other AI and agents MCP servers?

safety score 83/100 (higher than 68% of 4,460 AI and agents servers); tools 16 (the typical AI and agents server has 6); tools that change things 6% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.