Your AI agent can
buy things now.

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METERAM-ONE

+1k endpoints

All the data
your agents need.
Already connected.

View tools

Every answer, accounted for.

Watch it spend, line by line

Your agent decides which APIs it needs, calls them, and pays, in the same second.

No subscriptions. No API keys. No surprise invoice at the end of the month. Just the exact cost of the exact answer.

A promise you can verify.

Limits your agent cannot talk its way around

Database limits are a promise. A bug, a prompt injection, or a stolen key rewrites them.

Cerberus writes the limit into a Squads v4 PDA. The Solana runtime rejects the transaction. No code runs. No database is asked.

Read the code

Spend with control.

Metera for AI builders

Run agents that discover, call, and pay for APIs automatically. No billing setup, no key management, no rate-limit negotiations. Ship faster and let the protocol handle the rest.

Metera for enterprise teams

Set per-agent spending limits, audit every transaction, and control exactly which APIs your agents can access. Limits are enforced on-chain via Squads Protocol — a cap your agent cannot talk its way around, not a number in a database.

Metera for API providers

Monetize any API or MCP server in minutes. Agents find you, pay per call, and revenue lands in your wallet in USDC — in any country.

List once.
Instant revenue.

REST APIs

Paste your URL, set your price, get paid per call. Payouts in USDC, in any country — live in under 60 seconds.

MCP servers

Wrap your existing MCP server with 5 lines of code. Every tool call earns USDC directly to your wallet. No changes to your tools, no billing setup, no contract negotiations.

List your API

Learn about our plans

Free

$0

$5 in credit to start

Never expires

Manual top-up

Get started

ProPOPULAR

$29

per month

$30 credit included monthly

Credits never expire

API key access

MCP access

Auto recharge available

Select plan

Scale

$99

per month

$120 credit included monthly

Everything in Pro

Multiple agents

Usage dashboard

Priority support

Select plan

Enterprise

Custom

Everything in Scale, plus:

SSO

Guaranteed SLA

Fiat invoicing

Department-level limits

Dedicated support

Contact us

FAQ

How do I connect Metera to Cursor or Claude Code?+

Can my agent spend without limits?+

Do I need a crypto wallet?+

What happens if my balance runs out?+

How do I list my API or MCP server?+

# Metera — Complete Agent Specification

> Billing infrastructure for AI agents on Solana.
> Any API or MCP server charges agents in USDC via x402.
> No banks, no KYC, no humans.

## Identity

Name: Metera
Homepage: https://metera.xyz
API base: https://api.metera.xyz
Canonical agent spec: https://metera.xyz/AGENTS.md
llms.txt: https://metera.xyz/llms.txt
Skill per agent: https://api.metera.xyz/skill/{agentKey}
Marketplace JSON: https://api.metera.xyz/api/marketplace
MCP Registry JSON: https://api.metera.xyz/api/mcps

## Agent connection rule

FIRST: check if METERA_AGENT_KEY exists in environment.

If it exists:
  Read https://api.metera.xyz/skill/{METERA_AGENT_KEY}
  Follow the instructions there exactly.

If it does not exist:
  Tell the human: "Go to metera.xyz/agents, create an agent wallet, and share your agent key."
  Wait for the agent key before proceeding.

## How to pay for an API (one-step proxy)

POST https://api.metera.xyz/agent/{agentKey}/fetch
Content-Type: application/json

{
  "url": "https://api.metera.xyz/p/{slug}",
  "method": "GET"
}

Response:
{
  "success": true,
  "response": { "status": 200, "body": {} },
  "payment": { "amount": "0.001", "token": "USDC", "chain": "solana", "txHash": "..." },
  "paid": true
}

## Connect to a paid MCP server

Option A — SDK:
  import { MeteraClient } from '@metera/mcp-client'
  const client = new MeteraClient({ agentKey: process.env.METERA_AGENT_KEY })
  const mcp = await client.connect('https://mcp-server-url/sse')
  const result = await mcp.callTool('tool_name', { arg: 'value' })

Option B — MCP config (Claude Code, Cursor, Windsurf):
  {
    "mcpServers": {
      "metera": {
        "command": "npx",
        "args": ["@metera/mcp-client"],
        "env": { "METERA_AGENT_KEY": "your_agent_key" }
      }
    }
  }
  Use tool metera_list to discover all available MCPs.
  Docs: https://metera.xyz/docs/mcp-integration

## Spending tiers

Tier 1 (auto): amount <= maxPerCall — executes immediately, enforced on-chain via Squads v4.
Tier 2 (verify): rate check — returns 429 on anomaly.
Tier 3 (human): amount > tier3Threshold — held pending approval at metera.xyz/agents.

## Available APIs

  Browse all: https://api.metera.xyz/api/marketplace

Browse all: https://api.metera.xyz/api/marketplace

## Available MCP Servers

  Browse all: https://metera.xyz/mcps
  Connect via: npx @metera/mcp-client

## Developer resources

npm install @metera/mcp-server  ← monetize your MCP server (5 lines)
npm install @metera/mcp-client  ← connect agents to paid MCPs
Docs: https://metera.xyz/docs
MCP integration: https://metera.xyz/docs/mcp-integration
MCP registry: https://metera.xyz/mcps
AGENTS.md: https://metera.xyz/AGENTS.md

## Technical metadata

{
  "name": "metera",
  "version": "1.0.0",
  "x402": { "supported": true, "chains": ["solana"], "tokens": ["USDC"] },
  "mcp": { "clientSdk": "@metera/mcp-client@0.2.1", "serverSdk": "@metera/mcp-server", "registry": "https://api.metera.xyz/api/mcps" },
  "marketplace": { "endpoint": "https://api.metera.xyz/api/marketplace", "registration": "https://metera.xyz/proxy" },
  "security": { "spendingLimits": "on-chain via Squads Protocol v4", "program": "SQDS4ep65T869zMMBKyuUq6aD6EgTu8psMjkvj52pCf" }
}