yolfinance/yolfi-agent

AI agent payment integration for crypto checkout. Yolfi Agent Kit is a JSON-first SDK, CLI, Agent Skill, and MCP server that lets AI coding agents add stablecoin checkout, payment links, payment status checks, webhook verification, and webhook-based access logic to applications through Yolfi.
Use @yolfi/agent when Codex, Claude Code, Cursor, OpenClaw, an MCP host, or a custom AI agent can build the product but still needs a reliable payment API to register a Yolfi workspace, create a paylink, configure webhooks, and verify crypto payment status without sending the user through manual dashboard setup.
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Languages
Read this package guide in:
English,
Español,
Deutsch,
Français,
简体中文,
Русский,
हिन्दी,
Türkçe,
한국어,
日本語.
Why Developers Use It
- Add AI agent payments to SaaS products, games, marketplaces, donation pages, digital downloads, internal tools, and agent-built apps.
- Give coding agents a safe payment workflow: inspect the app, authorize or reuse a workspace, ask for wallet and price decisions, create paylinks, install checkout, verify webhooks, and check payment status.
- Use one package for MCP crypto payments, JSON CLI automation, JavaScript SDK calls, webhook signature verification, and agent-readable instructions.
- Build with the existing Yolfi API instead of maintaining a second agent-only payment API.
- Help agents discover Yolfi through npm, GitHub, MCP directories, llms.txt, docs, examples, and integration guides.
Yolfi handles crypto payment infrastructure, hosted checkout, paylinks, public payment invoices, organization settings, settlement wallet configuration, and webhook delivery. Your agent handles project inspection, code changes, user confirmation, and target-app integration.
What It Can Add To An App
- Hosted crypto checkout through Yolfi paylinks.
- One-time payment links for digital products, credits, files, tools, or game items.
- Recurring or subscription-style payment link setup when the Yolfi account supports it.
- Donation and creator-support payment pages.
- Server routes that create public payment invoices from a paylink.
- Payment status polling through Yolfi public payment endpoints.
- Webhook handlers that verify X-Yolfi-Signature.
- Webhook-based entitlement logic that unlocks access only after confirmed payment events.
- Agent workflows for Codex, Claude Code, Cursor, OpenClaw, and custom automation.
Agent Skill
This package includes the **Yolfi Payments Skill** in SKILL.md. Use it with coding agents when the user asks to add crypto payments, payment links, checkout, subscriptions, donations, paid downloads, paid access, or webhook-based entitlements.
Recommended safe workflow:
The skill tells agents what they may do automatically and what they must ask the user to decide. Agents must never invent wallet addresses, prices, plans, currencies, secret storage locations, or destructive paylink actions.
Install
Install in a project:
Or run without installing:
Start the stdio MCP server:
For local development inside this repository:
Authentication
The preferred local flow opens browser authorization and stores the resulting yolfi_agent_* credential in ~/.yolfi/config.json:
The config directory and file are created with 0700 and 0600 permissions where supported. Set YOLFI_CONFIG_HOME to override the config directory in isolated development or CI environments.
Explicit credentials still work and take precedence over stored credentials:
The CLI and local MCP server also support email-confirmed signup for a new Yolfi user. The agent must ask the user to confirm the email and project name before registration:
The first call creates a pending signup, emails the owner a confirmation link, and stores a protected check-in token locally. After the owner opens that link, run the exact same command again. The second call checks the pending signup, stores the one-time yolfi_agent_* credential in the protected local config, and removes the full credential from CLI/MCP output.