x402-enabled browsing on Chrome. Seamless micropayments, full spend controls and security. First of its kind.
Your agents don't need an audience.
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x402_PRIVACY_ARCHITECTURE
Standard x402 payments leave a trail; merchants see who paid, and the chain records the transfer. Primer's privacy architecture breaks that link through onion-routed requests and pooled settlement.
Off-chain
On-chain (Base)
Data flow
Encrypted
Money flow
Service
Sentinel Nodes
Solver Mesh
Service
Federated Composers
Contract
$PR Staking
Contract
Fee Manager
Service
Decoy Flow
Input
Agent
Relay
Entry
Relay
Middle
Relay
Exit
Output
Merchant
Contract
Dark Pool
Service
Facilitator
Chain
Base
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HOW_IT_WORKS
Agent-led privacy. The agent chooses whether to use privacy routing. Merchant receives a standard x402 payment – no special integration required.
Solver Mesh. 3-hop onion routing through $PR-staked relays. Entry knows WHO, exit knows WHAT, but neither knows both. Sentinels monitor for misbehaviour.
Federated Composers. Multiple independent operators correlate Entry/Exit signals via session token, validate balance against Dark Pool, and construct signed payment authorizations.
Decoy Flow. Staked operators generate cover traffic through the mesh, inflating the anonymity set even at low real volume.
Settlement. Facilitator submits Pool→Merchant settlement to Base. On-chain shows Pool→Merchant, never Agent→Merchant.
x402 settlement for the agentic economy.
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INTEGRATION
No signup, no API keys — just point your server at the facilitator URL below for verification and settlement of x402 transactions on Base and SKALE Base. All x402 payment schemes are supported: exact, upto, and batch settlement.
x402 v1 & v2 capable, ERC-20 support, and fully compatible with smart-wallets.
x402.primer.systems
<copy>
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ACTIVITY
ONLINE
—
Transactions Settled
—
Total Volume Settled
—
Daily Buyers
—
Daily Sellers
LAST 24HRS
—
24h ago
now
LATEST TRANSACTIONS
○
Loading transactions...
Deflationary by design.
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TOKEN_DETAILS
$PR
Primer Network Token
Base
0x2357110F5F0c5344EEf75966500c75116A4aA153
Robinhood Chain
0x235767cc3d01ec18B5db87973975AC8616b2A153
294,278,048
Max Supply
3,715,596
Adaptive Burns (—% annualised)
—
Total / Circulating (live)
Bridge
Move PR between chains
>
Fair launch
No private sale, no public sale, no VCs.
>
100% circulating
No unlocks, vesting, or inflation. Supply is fixed; further changes are deflationary only.
>
Utility
Network fees (USDC, ETH) route to buybacks and staking rewards for Network Service operators. Operator slots are limited and require staking of $PR. Premium app features unlock with PR holdings.
>
Adaptive Burns
Every trade strengthens the pool via automatic buybacks and burns. PR becomes deflationary and ETH flows back to the pool, supporting liquidity for the next trader. Burn rates adjust to market conditions, hard-capped at 5%.
BURNS (14D)
...
14d ago
yesterday
Available on
$ Primer Pay Chrome Extension
$ Primer for WordPress WordPress Plugin
One-click x402 monetisation for posts and content. Native Gutenberg block, auto theme-matching, access controls, and agent discovery. Handles both human and agent consumers.
@ MultiClaw Win · macOS · Linux
Get a grip on your agents! Secure multi-agent x402 manager with hard private key separation, spend controls, Google AP2 intents & receipts, and direct agentic.market integration to source services and APIs without leaving the app. Agent-agnostic; simple set up with any model. Runs on your desktop or direct from USB.
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HOW_IT_WORKS
x402 is an open payment standard based around the HTTP 402 status, meaning Payment Required. This is in the same family as 404; Not Found. HTTP status codes were introduced in the 1990's, with 402 being intended for a then-unknown future payment system. In 2025, x402 unlocked this potential, allowing for gasless, instant settlement of agent-to-agent payments of any size.
Primer expands on the basic x402 offering with full ERC-20 support via the Prism router.
Payment Flow
1. Client requests resource, server returns HTTP 402 + payment requirements
2. Client signs EIP-712 authorization (no tx, just signature)
3. Facilitator verifies signature, settles on-chain, sponsors gas
4. Server delivers resource with tx receipt
Read more: x402.org
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LEARN_MORE
docs.primer.systems — Primer integration guides
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OVERVIEW
Primer Systems builds payments and privacy infrastructure for the agentic economy. Our apps are available on Chrome Web Store, the WordPress Plugin Directory, and Win/MacOS/Linux.
Based in London, England, the team has been active in digital assets since 2013 and brings engineering, blockchain, and institutional finance experience to a domain that needs all three.
If you’re building something interesting or just want to discuss what we do, we’re always pleased to hear from you: dev@primer.systems
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PARTNERS
We are proud to be in working partnerships with certain exemplary projects building in or adjacent to payments and privacy, including:
NØNOS
A post-quantum zero-state OS with anonymous networking. NONOS runs from USB and leaves nothing behind; an ephemeral, RAM-resident operating system for Cyberpunk privacy.
nonos.systems →
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COLORS
Lime
#baea2a
Rust
#E84536
White
#fafafa
Lime Dim
#7a9a1a
Rust Dim
#B7410E
Black
#09090b
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TYPOGRAPHY
JetBrains Mono
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USAGE
Use the green logo on dark backgrounds, black on light. Don’t stretch, rotate, or recolor the logo.
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FOR_PROVIDERS
Use official @x402 middleware with Primer facilitator:
import { paymentMiddleware } from '@x402/express' import { primerFacilitator } from '@primersystems/x402' const routes = { '/api/premium': { price: '$0.01', network: 'eip155:8453', // Base payTo: '0xYourAddress' } } app.use(paymentMiddleware(routes, { facilitator: primerFacilitator() }))
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FEATURES
Primer Facilitator — Pre-configured client for x402.primer.systems
Additional Networks — SKALE Base & Robinhood Chain
Prism Settlement — EIP-712 payloads for any ERC-20 token
CLI Scaffolding — Generate Bittensor/Chutes AI proxy projects
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FOR_PROVIDERS
Use official x402 middleware with Primer facilitator:
from x402 import payment_middleware from primer_x402 import primer_facilitator_sync routes = { '/api/premium': { 'price': '$0.01', 'network': 'eip155:8453', # Base 'payTo': '0xYourAddress' } } facilitator = primer_facilitator_sync() app.add_middleware(payment_middleware(routes, facilitator=facilitator))
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FEATURES
Primer Facilitator — Pre-configured client for x402.primer.systems
Additional Networks — SKALE Base & Robinhood Chain
Prism Settlement — EIP-712 payloads for any ERC-20 token
CLI Scaffolding — Generate Bittensor/Chutes AI proxy projects
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VALIDATOR
The Primer Validator inspects any x402 endpoint — not just our own. Useful for testing your integration, debugging payment flows, education, and manual pre-agent checks.
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TEST_PAYWALL_BUILDER
Generate custom x402 paywall endpoints for testing agent payment flows. Configure the network, amount, and recipient to create a paywall URL that returns 402 Payment Required.
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AP2_REGISTRY
Look up and examine Google AP2 Intent Mandates submitted via MultiClaw to ascertain an agent's spending permissions. New mandates may also be posted directly.