Rhumb

Index ranks. Resolve routes. Rhumb is an agent gateway for external tools: Index scores and compares services; Resolve routes supported capability calls through governed execution rails with receipts.

🌐 rhumb.dev · ⚡ Quickstart · 🧭 Resolve · 💵 Pricing · 📊 Leaderboard · 📖 Methodology · 🔑 Trust

For agents: See llms.txt for machine-readable documentation and agent-capabilities.json for structured capability metadata.

Start in 30 seconds

MCP (recommended)

npx -y --package rhumb-mcp@latest rhumb-mcp

Zero config. Discovery tools work immediately — no signup, no governed API key.

For execution, pass your governed API key:

RHUMB_API_KEY=your_key npx -y --package rhumb-mcp@latest rhumb-mcp

Get a governed API key →

API (read-only, no auth)

curl "https://api.rhumb.dev/v1/services/stripe/score"

# See supported execution routes before you execute
curl "https://api.rhumb.dev/v1/capabilities/email.send/resolve"

All read endpoints are public, including Resolve readiness checks. Estimate and execute require an authenticated payment path.

What Rhumb does

Use Rhumb Index when an agent needs to discover and evaluate services. Use Rhumb Resolve when the task is on a supported capability path and you want governed execution with an explicit receipt.

Agents need external tools. Choosing the right one is hard — not because of feature lists, but because of:

• auth and signup friction
• provisioning reality vs. marketing claims
• schema instability
• failure recovery when no human is watching
• hidden costs and rate limits

Rhumb makes those constraints visible before you commit.

Best fit today

Rhumb is strongest today for research, extraction, generation, and narrow enrichment.

Treat broader multi-system business automation as future scope, not the current launch promise. Use Layer 2 capabilities for real work now, and treat Layer 3 as beta with an intentionally sparse public catalog.

Rhumb Index — Discover & Evaluate

1,038 scored services across 50+ domains. Each gets an AN Score (0–10) measuring execution quality, access readiness, and agent autonomy support.

• find_services — Search indexed Services by what you need them to do
• get_score — Get the full AN Score breakdown for a Service: execution quality, access readiness, autonomy level, tier label, and freshness
• get_alternatives — Find alternative Services, ranked by AN Score
• get_failure_modes — Get known failure patterns, impact severity, and workarounds for a service
• discover_capabilities — Browse Capabilities by domain or search text
• resolve_capability — Given a Capability ID, and optionally a credential mode, returns ranked providers with health status, cost per call, auth methods, endpoint patterns, execute guidance, and machine-readable recovery fields like recovery_hint.resolve_url, recovery_hint.credential_modes_url, and, when applicable, recovery_hint.alternate_execute_hint or recovery_hint.setup_handoff, plus typo recovery when the capability ID is wrong

Discovery breadth is wider than current execution coverage. The index is broader than what Rhumb can execute today.

Rhumb Resolve — Execute

415 capability definitions across 16 callable providers today. Resolve chooses th

... View full README on GitHub