# Atomadic — AI Agent Infrastructure API

> Agent Control Plane for the A2A economy. 146+ endpoints: security, trust, reputation, escrow, SLA enforcement, compliance, agent discovery, formal verification, and inference. x402 USDC on Base L2. No signup required.

AAAA-Nexus is built for autonomous AI agents and A2A systems. Pay per call with USDC on Base L2 via x402 — agents pay independently, no human approval loop. Or buy a credit pack once and use any endpoint.

## Discovery

- [Agent Card (A2A v1.0)](https://atomadic.tech/.well-known/agent-card.json): Google A2A protocol agent card — 17 skills, full control plane manifest
- [OpenAPI Spec](https://atomadic.tech/openapi.json): Full API schema
- [Pricing](https://atomadic.tech/.well-known/pricing.json): Per-endpoint micro-USDC pricing
- [MCP Server](https://atomadic.tech/.well-known/mcp.json): MCP tool discovery
- [MCP Plugin Install](https://atomadic.tech/docs/mcp): Drop-in Python MCP server for Claude Code, VS Code, Cursor (113 tools, `pip install aaaa-nexus-mcp`)

## Free Endpoints (no key required)

- [Health](https://atomadic.tech/health): Service health + version
- [Entropy Oracle](https://atomadic.tech/v1/oracle/entropy): Entropy epoch + nonce
- [Quantum RNG](https://atomadic.tech/v1/rng/quantum): Quantum-seeded random bytes
- [Metrics](https://atomadic.tech/v1/metrics): Live platform metrics

## Paid Endpoints (x402 USDC or API key)

- [Threat Score](https://atomadic.tech/v1/threat/score): Triality threat consensus — $0.060/call
- [NEXUS AEGIS](https://atomadic.tech/aegis): Enterprise firewall and compliance gateway
- [Hallucination Oracle](https://atomadic.tech/v1/oracle/hallucination): Deterministic LLM hallucination bound — $0.040/call
- [RatchetGate](https://atomadic.tech/v1/ratchet/register): 47-epoch session security — $0.020/call
- [AI Inference](https://atomadic.tech/v1/inference): Llama 3.1 8B — $0.100/call
- [HELIX Compress](https://atomadic.tech/v1/compress): Model compression — $0.200/call
- [Identity Verify](https://atomadic.tech/v1/identity/verify): Topological identity check — $0.080/call

## Optional

- [Quickstart Guide](https://atomadic.tech/quickstart): Setup and first API call
- [Changelog](https://atomadic.tech/changelog): Release history
- [Benchmarks](https://atomadic.tech/benchmarks): HELIX vs QuIP#, GPTQ, AWQ
- [Legal](https://atomadic.tech/legal): Terms of service and privacy policy