Primer Systems builds open payment infrastructure for the agentic economy based on the x402 protocol.
We operate a public x402 facilitator that verifies and settles stablecoin payments on Base with no signup and no API keys; any resource server can point at it and start charging per request in minutes. Our upcoming EVM privacy network is designed to afford agents discreet payment opportunities through onion-routed requests and pooled settlement.
We also produce a range of apps and tools for devs, merchants, consumers, and traders.
Our Apps
Add x402 middleware to any endpoint and charge per call in digital dollars. The Primer facilitator (or another of your choosing) verifies the payer's signature and settles on Base. No accounts, no invoices, no minimum ticket size.
Register agents in MultiClaw or Vault, assign a spend and/or trade policy, and agents sign x402 payments (or trade requests) through the app under daily caps, per-request limits, and domain allowlists. The agent never sees a private key and every payment leaves an auditable receipt via Google AP2 mandates. Works out of the box with any agent or model.
Primer Pay (on Chrome) and the Primer Pay WordPress plugin let readers unlock a single post for cents in stablecoins. The first x402 WordPress integration built for human readers rather than bots, with a /.well-known/x402 index so agents can discover and buy the same content.
Standard x402 payments leave a trail - merchants see who paid and the chain records the transfer. For agents making frequent micropayments across many services, this creates a detailed activity profile some may wish to avoid. Primer's upcoming privacy architecture is designed to break the link between payer and payment through onion-routed requests and pooled settlement.
Point any resource server at https://x402.primer.systems and start verifying and settling immediately. POST /verify validates an EIP-712 payment authorization without touching the chain; POST /settle executes it and returns the transaction hash. No onboarding, no keys to provision, and no per-transaction fees.
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