Payment authorization layer for AI agents with enforced spending limits
AI runs where you own it
Stage
Not given
Not given
Founded
Not given
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Based in
US
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Pricing model
Paid
Freemium
Pricing
3¢ per successful transaction (flat fee, no volume tiers). For transactions under $1, the fee is 3% with a 0.5¢ minimum. Connecting a wallet and setting spending limits is free for users; only merchants pay transaction fees.
RailCall local runtime: free. RailHub Team: $5 per seat per month. Cloud agents: $5 per trained agent per month. Advanced thinking (overflow): metered against a budget you set, with 500 flows per month included. Storage on hub: $0.25 per GB-month with 5 GB free.
Key features
Hard spend limits with atomic enforcement preventing overspending to the cent
Cryptographic spending mandates that agents cannot override
Merchant allowlists restricting agent payments to approved vendors
Auto-expiration and instant revocation of spending mandates
Settlement via Stripe (190+ countries, 135+ currencies) or USDC on Base
Zero credential exposure—agents never see card numbers or private keys
Automatic endpoint discovery on Delegare Market, agentic.market, and MPPScan
Studio visual workflow builder with 1,000+ nodes
CLI and terminal-first interface
Ed25519-signed tamper-evident receipts
Human approval airlock for all actions
Autonomous agents that run 24/7
Capacity routing across organization machines
MCP integration with 33 tools
Multi-level human approval workflows
Offline receipt verification
Company-wide stop button
What makes it different
Only 3¢ per transaction with no volume tiers or minimum transaction amounts, compared to ~$1.03 for Stripe base fees on $25 transactions
Merchants integrate in 5 minutes with just 5 lines of code
Agents discover and pay endpoints without manual registration or configuration
Transactions under $1 cost only 3% (minimum 0.5¢) making micropayments commercially viable
Entire local runtime free with MIT license, no login required
Cryptographically signed receipts verifiable offline
Delegare
RailCall