Built on x402 · USDC on Base

Every paid API your AI agent needs.
One endpoint. One wallet.

Axon is the universal API gateway for autonomous agents. Deposit USDC once, call any API, pay by request. No subscriptions. No juggling 30 API keys. No human in the loop.

Start free — $5 in credits Read the docs →

Your agent's first paid API call

// Search the web, pay $0.005 in USDC — no keys, no signup for SerpAPI
const res = await fetch(
  'https://api.axon.dev/v1/call/serpapi/search?q=best+espresso+in+lisbon',
  { headers: { 'x-api-key': process.env.AXON_KEY } }
);

const data = await res.json();
// → { organic_results: [...], cost_usdc: "0.005500", cache: "miss" }

12+ APIs at launch, more every week

Your agent talks to all of them through one endpoint.

OpenAILLM

AnthropicLLM

FirecrawlScraping

SerpAPISearch

ExaNeural search

TavilyAgent search

ReplicateOpen models

ElevenLabsVoice

DeepgramSpeech→Text

ApolloEnrichment

OpenWeatherWeather

Stripe IssuingVirtual cards

Built for agents, not for dashboards.

Zero integration hell

One API key. One base URL. One invoice. Your agent can discover and call any listed API without credentials, sign-ups, or webhooks per vendor.

Pay per request, in USDC

Deposit USDC on Base. Every call debits your wallet atomically. No monthly plans. No overage surprises. Agents can budget programmatically.

Cache-aware pricing

Cached responses are served at 50% off. Your agent pays less for repeated queries — and you don't fund the upstream twice.

x402-native

Built on the open HTTP 402 payment standard. Works with any x402-compatible client, SDK, or agent framework. No lock-in.

Fallback & reliability

When one provider is down, route to the next. Your agent keeps working. You pay the normal price.

Framework-ready

Drop-in packages for LangChain, crewAI, Vercel AI SDK, and n8n. 20 lines of code, and your agent is buying data autonomously.

How it works

1

Deposit USDC on Base

Get a dedicated deposit address. Send USDC. Balance credits within one block confirmation.
2

Call any API through one endpoint

POST /v1/call/{'{api}'}/{'{endpoint}'}. Axon authenticates, debits your wallet, proxies the call, caches the response.
3

Get back structured response + cost header

Every response carries x-axon-cost-usdc and x-axon-cache. Your agent sees exactly what it paid and whether the answer was cached.

Pricing scales with usage, not seats.

No minimums. No annual contracts. Free $5 to get started.

Free

$5 signup credit

15% markup on calls
10 req / min
All public APIs
Community support

Start free

Pro

$49/mo

+ usage

5% markup on calls
Unlimited requests
Usage analytics
Aggressive cache
Priority support

Get Pro

Team

$199/mo

+ usage

3% markup on calls
Policy engine + budgets
Multi-user accounts
Private APIs
SLA on uptime

Frequently asked

What is x402?

HTTP 402 "Payment Required" is a status code that's been in the HTTP spec since 1997 but went unused. x402 is Coinbase's modern revival: APIs respond with 402 + payment requirements; clients pay on-chain; the call proceeds. It's the first payment protocol designed for AI agents.

Do I need to hold USDC to use Axon?

For now, yes — deposits are in USDC on Base. Fiat on-ramp and card-to-USDC conversion are on the roadmap.

What happens if an upstream API fails?

We refund the call automatically and surface the upstream error. Your wallet is never debited for failed requests.

Can I add a private / custom API?

On Team and Enterprise plans, yes. You register a provider config, we route through Axon, and it behaves like any public API on the platform.

How is caching handled?

Every API defines TTLs per endpoint. Cached responses are served at 50% of the list price. Your agent sees x-axon-cache: hit on cache hits.

Join the early-access list.

We're onboarding the first 100 builders personally. Tell us what you're building, we'll ship credits + direct access.

We read every one. Or email directly: shopkaolin.com@gmail.com

Every paid API your AI agent needs. One endpoint. One wallet.