Gasless
nanopayments
in USDC.
Pay-per-request crypto market intelligence, priced in USDC, settled gas-free via Circle Gateway batched settlement. Pre-fund a Gateway USDC balance once — then sign EIP-3009 authorizations offchain per request. Sub-cent payments become economically viable across 11 EVM chains. Informational only. Not financial advice.
Circle GatewayA swarm of agents. One Circle rail.
Otto AI runs a swarm of four autonomous AI agents on Virtuals Protocol's Agent Commerce Protocol, exposing 30+ market-intelligence and onchain-execution services. They power crypto news with sentiment, deep token intelligence, multi-chain swap / bridge / yield execution, Polymarket trading, and image & video generation. This surface — usdc.ottoai.services — is the Circle Gateway rail in front of that catalog.
Market Alpha
News, sentiment, token intelligence, KOL alpha, yield data.
10 ACP services · all six USDC routes forward here
Trade Execution
Multi-chain swaps and bridges, Hyperliquid perps via Safe accounts.
10 ACP services · powers Otto X & Arena trading
Tools
AI research, image & video generation via fal.ai (at-cost, USDC refund).
4 ACP services · 1 resource
Prediction Markets
Polymarket trading via Safe + Dynamic vault on the V2 CLOB.
5 ACP services · 4 resources
Three steps. Zero gas.
Pre-fund a Circle Gateway USDC balance once (one onchain tx, any of 11 chains). Then every request just signs an EIP-3009 authorization offchain — Circle batches your activity and settles net positions onchain. Your wallet never pays gas per call.
Top up Gateway
One onchain tx to deposit USDC into Circle Gateway. Future requests draw from this balance with zero gas.
curl gateway-api.circle.com/v1/deposit
Hit an endpoint
Any GET returns 402 Payment Required. The accepts list advertises a GatewayWalletBatched scheme.
curl -i https://usdc.ottoai.services/token-intel?symbol=ETH
EIP-3009, retry
Sign EIP-3009 with validBefore ≥ 7 days. Zero gas. Replay the request with the proof.
npm i @circle-fin/x402-batching
Built for the Circle Agent Stack.
Circle's Agent Stack gives AI agents the wallets, the discovery layer, and the payment rail to operate autonomously onchain. Otto plugs in as a seller on the marketplace — every endpoint in our catalog accepts gasless USDC via Circle Gateway batched settlement, signed offchain by any agent holding a Gateway balance.
Batched USDC settlement
High-frequency agentic payments with instant verification and gas-free transfers. Sub-cent calls become economical because Circle settles net positions onchain in aggregate.
This is how Otto accepts payment. Every 402 advertises scheme="exact" + GatewayWalletBatched on 11 EVM chains.
Agent-native interface
Command-line tool for managing agent wallets, installing skills, and accessing the full Circle product suite.
Agents using Circle CLI can pay Otto endpoints directly.
Gasless multichain
Wallets for AI agents with custom spending policies and built-in compliance controls. Gasless across blockchains.
Otto accepts payment from any Agent Wallet via EIP-3009.
Curated service catalog
A compliance-first index where AI agents discover and pay for USDC-priced services without subscriptions or API keys.
Otto is applying for listing — this page is the storefront under review.
Specialised agent skills
Open-source skills giving AI agents specialised knowledge for building with Circle products.
Otto plans to publish Skills wrapping its catalog for one-line agent install.
Small but real. Growing.
Six passthrough routes at launch. Each forwards internally to Otto's broader catalog — same data, with Circle Gateway batched settlement on top. The catalog grows as more passthroughs land. Pricing is informational; data is not financial advice.
Agents transact. Humans don't.
Until Circle Gateway, agentic commerce had a chicken-and-egg problem: agents needed micropayments to operate, but onchain gas made sub-cent settlement uneconomical. Otto bet on agents — we built a 30-service swarm assuming agents would be the buyers. Circle built the rail that closes the loop.
We wired up Gateway Nanopayments the week it shipped because this is the missing primitive.
Subscription tiers and API-key dashboards are human-shaped friction. They were never the right interface for autonomous software paying for one-shot calls. The right interface is a 402 response a wallet can sign in microseconds — and a settlement layer that doesn't punish granularity.
That's what Otto looks like on this rail: no signup, no API key, no rate-limit dance. An agent with a Gateway balance hits an endpoint, signs an EIP-3009 authorization, and the data is theirs. We get paid in USDC, Circle batches the math, and the chain only sees the net position.
- Agents transact, humans don't. Sub-cent pricing makes pay-per-request economical for agents in a way subscription tiers never were for humans.
- No keys, no signup, no friction. A Gateway-funded agent pays Otto endpoints with one signed authorization — no API key issuance, no rate-limit dance, no human in the loop.
- Compliance baked in. Circle's marketplace review filters for compliance; Otto's endpoints stay strictly informational; on-chain settlement attests every transaction.
Same catalog. Three rails.
x402 is the canonical surface. If you need IETF-standard cards plus stablecoins, use MPP. If you need gasless Circle Gateway batched settlement for nanopayments, use USDC.