Agentic Payments with FX402

FX402 was designed with autonomous agents and AI services in mind.
Agents can rent access to APIs, datasets, or models using x402-compatible microtransactions — no UI required.

🤖 1. Concept

In an agent-to-agent economy, bots can:

Discover resources via metadata
Parse 402 Payment Required responses
Automatically pay for short-term access
Cache receipts for re-use

This enables machine-level commerce — dynamic, automated, and verifiable.

⚙️ 2. Agent Flow

Step	Action
1️⃣	Agent requests data from API
2️⃣	Receives R402 payload (pricing, tiers)
3️⃣	Selects optimal tier automatically
4️⃣	Pays and submits proof
5️⃣	Receives JWT receipt and continues ops

🧩 3. Example: Agent R402 Request


{
  "agent": "bot:market-analyzer",
  "action": "fetch-market-data",
  "r402": {
    "tiers": [
      { "id": "hour", "price": "0.01", "currency": "USDC" },
      { "id": "day", "price": "0.05", "currency": "USDC" }
    ],
    "modes": ["read"]
  }
}

The agent can automatically select the cheapest tier for its operation window.

🔒 4. Rate Limits & Fairness

Facilitators can enforce agent-level rate limits such as:

Requests per second
Receipt reuse detection
Blacklisting expired receipts

Agents can also implement caching policies for efficient micro-purchases.

💡 5. Example Use Cases

Agent	Purpose
Data Crawlers	Rent access to premium APIs temporarily
AI Models	Pay for inference windows (e.g., 1h access to weights)
Indexers	Stream data from blockchain providers under hourly plans
Automation Bots	Rent digital collectibles for short campaigns

🧭 6. Key Design Principles

Payments remain honor-system unless facilitator enforced.
No blockchain RPC calls needed — pure HTTP flow.
Works with Solana USDC, but can extend to Base or ETH.

📚 Next Steps

CDN Gating with JWT Receipts →