Tier list: tools payment agents can use

Updated 2026-11-08 · 49 tools · rubric v1

Payment agents move money. A mistake costs real money, so an agent must be able to practice first. We rank each tool by how much of that access it publishes. Sandbox, public API and key auth count most. Without a sandbox the score stops at 50, so the tool cannot rank above C.

S90+

AAudioPod AIIi18n-agentCCustomDomainSStripe

A75–89

No tools in this tier yet

B60–74

MMarchward

C40–59

AAiVikingsBBenchGeckoCChronaryCCloudBrowserCCloudflareEeach::labsEEmpirioLabs AIEEvoLinkFFourAFFrameThrowerGGitHubIIntoDNS.aiKKaiva BridgeKKeenableLLinearLLithtrixMMapMapMMarrow AIMMindsNNeonNNotionRResendSSentrySSupabaseAAgentDMBByteAsk Embedded DocsSSpotDBAAutenCCodeNibDDeepLedgerEElicitlyHHowseenKKinMMaguyvaRRius

Dunder 40

AAnki MCP ServerAAuthoryzeDdbmcpGGiljo HQKKernora Agent-SecJJoxoAAtlaso MemoryBBumbleBoxKKubit

What counts for payment agents

Fit = points the tool has ÷ points possible × 100. Tiers: S 90+, A 75+, B 60+, C 40+, D under 40.

Every tool, tier by tier

S tier (4)

• AudioPod AI · fit 100
  Transcription and audio stem separation
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth, Sandbox. Nothing missing. Details
• i18n-agent · fit 100
  Translation into 48 languages
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth, Sandbox. Nothing missing. Details
• CustomDomain · fit 93
  Connect custom domains for your users
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth, Sandbox. Missing: CLI. Details
• Stripe · fit 93
  Payments, subscriptions and refunds through the API and official MCP server, with a test mode to practice safely
  Has: MCP server, Public API, CLI, OpenAPI spec, Key auth, Sandbox. Missing: llms.txt. Details

B tier (1)

• Marchward · fit 60
  Permissions and spend caps for agents
  Has: MCP server, llms.txt, Key auth, Sandbox. Missing: Public API, OpenAPI spec, CLI. Details

C tier (35)

• AiVikings · fit 50 (capped: no sandbox)
  Domain search and registration for agents
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• BenchGecko · fit 50 (capped: no sandbox)
  Model pricing and benchmark data
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• Chronary · fit 50 (capped: no sandbox)
  Calendar API for agents
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox. Details
• CloudBrowser · fit 50 (capped: no sandbox)
  Cloud Chrome you can drive
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• Cloudflare · fit 50 (capped: no sandbox)
  Infrastructure from Workers to DNS, run through wrangler CLI and the MCP server
  Has: MCP server, Public API, CLI, OpenAPI spec, Key auth. Missing: Sandbox, llms.txt. Details
• each::labs · fit 50 (capped: no sandbox)
  Image, video and voice generation
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• EmpirioLabs AI · fit 50 (capped: no sandbox)
  Model calls and GPUs
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox. Details
• EvoLink · fit 50 (capped: no sandbox)
  One API for image, video and voice models
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox. Details
• FourA · fit 50 (capped: no sandbox)
  Web access and proxies
  Has: MCP server, Public API, llms.txt, Key auth. Missing: Sandbox, OpenAPI spec, CLI. Details
• FrameThrower · fit 50 (capped: no sandbox)
  Search film scenes
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• GitHub · fit 50 (capped: no sandbox)
  Issues, PRs and reviews handled directly through the official MCP server and gh CLI
  Has: MCP server, Public API, CLI, OpenAPI spec, Key auth. Missing: Sandbox, llms.txt. Details
• IntoDNS.ai · fit 50 (capped: no sandbox)
  DNS and email security checks
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox. Details
• Kaiva Bridge · fit 50 (capped: no sandbox)
  Turn API docs into an MCP server
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox. Details
• Keenable · fit 50 (capped: no sandbox)
  Web search and page reading
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox. Details
• Linear · fit 50 (capped: no sandbox)
  Project tracking where the official MCP server creates issues and moves their status
  Has: MCP server, Public API, Key auth. Missing: Sandbox, OpenAPI spec, CLI, llms.txt. Details
• Lithtrix · fit 50 (capped: no sandbox)
  Identity and memory for agents
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• MapMap · fit 50 (capped: no sandbox)
  Maps and routing
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• Marrow AI · fit 50 (capped: no sandbox)
  Approvals and audit logs for agent actions
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• Minds · fit 50 (capped: no sandbox)
  Market research with simulated customers
  Has: MCP server, Public API, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox, CLI. Details
• Neon · fit 50 (capped: no sandbox)
  Serverless Postgres with branches to test migrations first, MCP supported
  Has: MCP server, Public API, CLI, OpenAPI spec, Key auth. Missing: Sandbox, llms.txt. Details
• Notion · fit 50 (capped: no sandbox)
  Team wiki whose pages and databases can be read and written over MCP
  Has: MCP server, Public API, Key auth. Missing: Sandbox, OpenAPI spec, CLI, llms.txt. Details
• Resend · fit 50 (capped: no sandbox)
  Email API for developers: send mail and check delivery over MCP
  Has: MCP server, Public API, CLI, OpenAPI spec, llms.txt, Key auth. Missing: Sandbox. Details
• Sentry · fit 50 (capped: no sandbox)
  Error issues read over MCP so an agent can trace the cause and ship the fix
  Has: MCP server, Public API, CLI, Key auth. Missing: Sandbox, OpenAPI spec, llms.txt. Details
• Supabase · fit 50 (capped: no sandbox)
  Postgres, auth and storage set up through the MCP server and CLI
  Has: MCP server, Public API, CLI, Key auth. Missing: Sandbox, OpenAPI spec, llms.txt. Details
• AgentDM · fit 47 (capped: no sandbox)
  Messaging between AI agents
  Has: MCP server, CLI, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec. Details
• ByteAsk Embedded Docs · fit 47 (capped: no sandbox)
  Search embedded-systems docs
  Has: MCP server, CLI, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec. Details
• SpotDB · fit 47 (capped: no sandbox)
  Disposable data sandboxes
  Has: MCP server, OpenAPI spec, Key auth. Missing: Public API, Sandbox, CLI, llms.txt. Details
• Auten · fit 40 (capped: no sandbox)
  Control computers and phones
  Has: MCP server, CLI, Key auth. Missing: Public API, Sandbox, OpenAPI spec, llms.txt. Details
• CodeNib · fit 40 (capped: no sandbox)
  Navigate code structure
  Has: MCP server, CLI, Key auth. Missing: Public API, Sandbox, OpenAPI spec, llms.txt. Details
• DeepLedger · fit 40 (capped: no sandbox)
  Bookkeeping entries
  Has: MCP server, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI. Details
• Elicitly · fit 40 (capped: no sandbox)
  Human confirmation dialogs
  Has: MCP server, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI. Details
• Howseen · fit 40 (capped: no sandbox)
  Brand visibility in AI search
  Has: MCP server, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI. Details
• Kin · fit 40 (capped: no sandbox)
  Per-account permissions for agents
  Has: MCP server, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI. Details
• Maguyva · fit 40 (capped: no sandbox)
  Code search
  Has: MCP server, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI. Details
• Rius · fit 40 (capped: no sandbox)
  Observe agent run traces
  Has: MCP server, llms.txt, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI. Details

D tier (9)

• Anki MCP Server · fit 33 (capped: no sandbox)
  Manage Anki flashcards
  Has: MCP server, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI, llms.txt. Details
• Authoryze · fit 33 (capped: no sandbox)
  Spend limits and single-use cards for agents
  Has: MCP server, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI, llms.txt. Details
• dbmcp · fit 33 (capped: no sandbox)
  Connect to databases
  Has: MCP server, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI, llms.txt. Details
• Giljo HQ · fit 33 (capped: no sandbox)
  Context management for coding agents
  Has: MCP server, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI, llms.txt. Details
• Kernora Agent-Sec · fit 33 (capped: no sandbox)
  Security rules for coding agents
  Has: MCP server, Key auth. Missing: Public API, Sandbox, OpenAPI spec, CLI, llms.txt. Details
• Joxo · fit 27 (capped: no sandbox)
  Team board for coding agents
  Has: MCP server, CLI, llms.txt. Missing: Public API, Key auth, Sandbox, OpenAPI spec. Details
• Atlaso Memory · fit 20 (capped: no sandbox)
  Shared memory across tools
  Has: MCP server, llms.txt. Missing: Public API, Key auth, Sandbox, OpenAPI spec, CLI. Details
• BumbleBox · fit 20 (capped: no sandbox)
  Inbox search and reply drafts
  Has: MCP server, llms.txt. Missing: Public API, Key auth, Sandbox, OpenAPI spec, CLI. Details
• Kubit · fit 20 (capped: no sandbox)
  Query your data warehouse
  Has: MCP server, llms.txt. Missing: Public API, Key auth, Sandbox, OpenAPI spec, CLI. Details

How we check

• We read each tool's public pages, docs and repos for the seven signals. We do not run the MCP server or install the CLI.
• A signal counts only when we find it published. A “present” signal says the entry point exists. It does not grade quality.
• The points are our own rubric (v1). They are not a certification, and we have not yet checked them against real agent success rates.

Other tier lists: Coding agents · Automation agents · Data agents
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