AgentIndex
A static directory of x402-enabled agent services.
Agents that can pay for what they use need services that can charge for what they provide. AgentIndex catalogs APIs, tools, paywalls, and infrastructure that speak the x402 payment protocol, so builders can find paid endpoints without accounts, API keys, or subscriptions.
New here? Read what is x402? or submit a service to be listed.
Directory at a glance
Every count below is computed from the dataset at build time.
| Services listed | 500 |
|---|---|
| MCP-compatible services | 5 |
| Facilitators represented | 11 |
| Chains | Base (413), Base Sepolia (2), Bsc (1), Solana (84) |
- Data APIs: 214 listed
- Content Paywalls: 7 listed
- MCP Tools: 19 listed
- Search & Retrieval: 33 listed
- Finance & Trading: 113 listed
- Infrastructure & Facilitators: 15 listed
- Media Generation: 7 listed
- Commerce: 8 listed
- Identity Verification: 5 listed
- Other: 79 listed
Browse by category
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Data APIs
214 listed
Structured data endpoints that agents can query and pay for per request over x402.
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Content Paywalls
7 listed
Publishers and archives that unlock individual articles or reports for a micropayment.
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MCP Tools
19 listed
Hosted MCP servers and tool gateways that charge agents for each tool call.
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Search & Retrieval
33 listed
Search and retrieval APIs that return ranked results or cleaned documents for a per-query fee.
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Finance & Trading
113 listed
Market data, signals, and analytics services priced for autonomous trading agents.
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Infrastructure & Facilitators
15 listed
Facilitators, relays, and settlement infrastructure that keep x402 payments moving.
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Media Generation
7 listed
Image, audio, and video generation services sold per generation or per unit of output.
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Commerce
8 listed
Storefronts and checkout services that let agents buy digital or physical goods with x402.
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Identity Verification
5 listed
KYC, attestation, and personhood checks that agents can purchase on demand.
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Other
79 listed
x402-enabled services that do not fit neatly into any other category.
Featured x402 services
A deterministic sample from the current directory dataset.
- 1 dollar (USD1) - x420.dev — this coin will go up to 1 usd.
- 100xSOON — 100xSOON is the first x402 AI-native Mini Perp incubated by SOON.
- 10s SOON — SOON's first API server to interact with x402 enabled a social experiment called 10sSOON.
x402 guides
Long-form editorial guides to the protocol behind the directory. All guides
- What Is x402 Protocol? Open Payments for AI Agents
- How Does x402 Work? The Payment Flow, Step by Step
- Monetize AI Agent API: Per-Request Pricing with x402
- HTTP 402 Explained: The Status Code That Charges You
- What Is a Payment Facilitator in x402?
- x402 vs Stripe: Two Payment Rails for Different Buyers
- x402 vs L402: Two Protocols That Answer HTTP 402
- x402 on Base: Inside the Directory's Default Chain
- x402 on Solana: Small Catalog, Micro Prices
- x402 Facilitators Compared: The Settlement Landscape
- x402 Glossary: The Eight Terms That Matter
- The State of x402: What 100 Live Services Show
AgentIndex blog
Notes on the x402 protocol, the agent-service economy, and the quarterly State of x402 data reports. All posts · RSS feed
- State of x402: Q3 2026 — 2026-09-23