tab MCP server
io.github.paidwithtab/tab·v3.0.0Agents pay per call over HTTP 402 and x402: 8,600+ API routes, signed budgets and receipts.
not scanned yet
0 stars34 downloads/wk
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If you have run it, two minutes of your experience saves the next person an afternoon.
tab tools
No tool declarations could be read from the package source. They show once the server is installed.
How tab compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 89/100
- higher than 80% of 48,255 servers
- Downloads a week
- 34
- more than 23% of 12,191 servers with a package
Release history: 2 versions in the registry since 2026-10-23, latest 2026-11-03, typically one every 11 days.
Install tab in Claude Code, Cursor or VS Code
Runs npx -y paidwithtab on your machine. Read the scan report first; the gateway never runs local packages.
claude mcp add tab -- npx -y paidwithtab
What the publisher says
From the tab repository's README, as published. We do not edit it. Read it on GitHub
Payments for software agents.
Give an agent a wallet with rules, instead of giving it your wallet.
Quickstart · Run a company · For agents · For sellers · Protocol · Deployment · @paidwithtab
Contents
What is tab · Why tab · Mandates · How a payment works · Quickstart · For API providers · For agent developers · Companies · Settlement · x402 · Security model · Testing · Architecture · Roadmap
What is tab
tab is an open payment protocol for software agents.
It lets an agent discover a paid HTTP service, receive a price, authorize the purchase against rules set by its owner, pay, and receive the result. No human has to create an account, enter a card, or copy an API key.
Owners define those rules once, in a signed mandate:
The owner signs once. The agent then transacts on its own, and it cannot exceed what the owner authorized.
Owner
│
│ signs mandate
▼
Agent
│
│ HTTP request
▼
Gateway ────────► API
│
│ verifies mandate
│ enforces budget
│ settles payment
▼
USDGWhy tab
Software agents can already call APIs and use tools. Paying for those services is the part that still requires a person.
Today a human creates an account, enters payment information, generates an API key, configures billing, and hands credentials to the agent. tab replaces all of that with an HTTP payment.
Without tabWith tab
Agent calls API
HTTP/1.1 402 Payment RequiredAccount signup, card on file, API key handoff, billing setup.
Agent pays through tab
HTTP/1.1 200 OK
Tab-Receipt: evm:0x...No account. No card details. No shared owner key. No unrestricted wallet.
Mandates
A mandate is a signed spending authorization from an owner to an agent.
Shortened. The full README is on GitHub.
Nothing above is checked by us. What we check is on the safety report.
tab: common questions
- Is tab MCP server safe?
- Yes, by our scan: it is graded A (89/100). Read the tab safety report
- How do I install tab?
- It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
- Does tab need an API key?
- No secret keys are declared. It reads 4 settings from the environment.
- Is tab maintained?
- The last commit was 11 days ago (2026-10-24). The latest release is v3.0.0.
- What can I use instead of tab?
- Servers from other publishers that do the same job: Nautilus Compass Memory MCP server.
- How does tab compare with other MCP servers?
- safety score 89/100 (higher than 80% of 48,255 servers); downloads a week 34 (more than 23% of 12,191 servers with a package). Full comparison.
Alternatives to tab
Same job from other publishers: the closest match first, then the best rated.
- Nautilus Compass MemoryLocal-first long-term memory for AI agents, with byte-recomputable signed verification receipts.not reviewedEstablishedB