TapVow

BUZZ: 8%

One signed spending limit for every AI agent you run, across LLM calls and x402 payments.

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TapVow Overview

TapVow puts one signed spending limit in front of every AI agent you run. It is a small local gateway. Your agents get virtual keys and the gateway holds the real ones. A call that would break the limit is refused with HTTP 402 before it reaches the provider. The same budget covers LLM calls and x402 stablecoin payments. Each charge and each refusal is a signed ledger entry, so you can check every cent later. TapVow never holds funds. It works with Claude Code, OpenCode and any OpenAI-compatible client. MIT licensed, Node 22.13 or newer. x402 payments have run on the Base Sepolia testnet only. Mainnet payments are 0 today.

How to evaluate TapVow for payments workflows

TapVow is listed as a free payments AI agent with open source access. Use this page to compare its core capabilities, practical use cases, pricing model, and alternatives before adding it to your workflow.

A strong first-fit use case is Cap the daily spend of Claude Code on an API key, especially if your team is shortlisting payments tools for a specific operational need.

Best-fit checks before choosing: