Stablecoin escrow and transfer verification on Arc mainnet
Independent WhatsApp API for developers with signed webhooks and group management
Stage
Not given
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Founded
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Based in
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TH
Pricing model
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Freemium
Pricing
Free plan: up to 1,000 settled transfers per month and 10,000 payee checks per month; Growth plan: 0.10 USDC per settled transfer over 1,000, includes 100,000 payee checks, then 0.001 USDC each; Enterprise plan: contract pricing
Free sandbox: 180 messages per day, 10 new chats per month, 1,500 API calls per month. Paid channels: 1-4 channels $25 USD per month or $240 USD per year each; 5-9 channels $20 USD per month or $192 USD per year each; 10+ channels $11 USD per month or $106 USD per year each.
Key features
Payee verification with direct, escrow, or block decision
Transfer status and history tracking
Event webhooks for transfer lifecycle
TypeScript SDK for agent integration
MCP server for AI agents
Refund on non-delivery or expiry
Idempotency keys for safe retries
Rate limiting with plan-based quotas
Self-serve API key generation
Webhook signature verification
Send and receive WhatsApp messages
Signed HMAC-SHA256 webhooks
Group and community management
Media support (images, video, audio, documents)
Health panel with five readings per number
Unlimited messages on paid channels
Test delivery webhooks
MCP server for AI agents
Durable webhook outbox with retries
Number warm-up and rate limiting (HopGuard)
What makes it different
Transfers lock on-chain and release only with recipient proof, preventing wrong-wallet errors
Integrates AI agents through MCP server alongside REST API and TypeScript SDK
Automatic refunds after expiry without manual intervention
Free tier supports 1,000 transfers and 10,000 payee checks per month
Independent API not requiring Meta approval or per-conversation fees
Notol
HelloHop