Monad’s API Hub hosts 66 active services from independent providers, all accessible through pay-per-request micropayments. Prices range from $0.01 to $7.50 per endpoint call, with analytics heavyweight Nansen contributing 83 different endpoints alone.
At the core of the system sits the x402 v2 protocol, an open standard for internet-native payments that turns every API call into a tiny financial transaction. When a developer or an autonomous AI agent makes a request, the x402 facilitator on Monad handles verification and on-chain settlement automatically. The protocol operates on Monad’s mainnet (chain ID eip155:143) and its testnet.
Payments settle exclusively in USDC, Circle’s dollar-pegged stablecoin. Monad’s mainnet launched on November 24, 2025, with native USDC support and developer tools from Circle baked in from day one. The blockchain targets sub-second finality and up to 10,000 transactions per second.
Autonomous AI agents need programmatic access to information but traditional API marketplaces require account creation, email verification, credit card entry, and key management. Pay-per-request with USDC strips all of that friction away. At $0.01 per call on the low end, an agent could make 100 requests for a dollar, pulling on-chain analytics from Nansen or other providers without any pre-existing relationship.
The Monad Foundation joined the x402 Foundation on June 29, 2026, placing it alongside Coinbase, Circle, and Cloudflare as contributors to the open payment standard. The x402 Foundation’s goal is standardization: if multiple blockchains and service providers adopt the same protocol for pay-per-request transactions, developers write integration code once and it works everywhere.
The competitive landscape for blockchain data APIs includes established players like Dune Analytics, The Graph, and various RPC providers, most of which still rely on traditional subscription models. Sixty-six services is a decent starting catalog, and Nansen’s 83 endpoints provide genuine analytical depth. The pricing transparency, with costs visible per endpoint rather than buried in enterprise tier structures, is a distinguishing feature for developers managing usage costs.