Agent-readable commerce

Agentic Web Stack

ELPA exposes paid, deterministic utilities as crawlable offers and callable tools. This page is the human and machine hub for x402, MCP, A2A, UCP, and browser-agent readiness signals.

Tools: 64
Network: eip155:8453
Range: 0.002-0.015 USDC

Discovery surface

Channels To Occupy

AI Search and Query Fan-Out

active

Readable hub page, structured JSON-LD, and crawlable tool catalog for answer and citation surfaces.

/agentic-web/

x402 Bazaar Discovery

ready for facilitator metadata

Each paid endpoint has semantic descriptions, prices, schemas, and deterministic 402 behavior.

/agent-tools.json

MCP Tool Calling

local preview

Remote MCP-compatible JSON-RPC wrapper over the paid agent tools catalogue.

/api/mcp

A2A Agent Discovery

public card

Agent Card exposes skills, input/output modes, provider identity, and payment metadata.

/.well-known/agent-card.json

UCP and AP2 Commerce Readiness

experimental profile

Digital-service UCP profile declares custom ELPA capabilities and x402 payment handling.

/.well-known/ucp

Browser Agents and WebMCP

audit supported

Paid audit checks DOM, accessibility, well-known endpoints, x402 signals, and agent-commerce readiness.

/api/v1/agent-tools/agent-web-readiness-audit/

Well-known layer

Machine Entry Points

Signal	Path	Use
A2A Agent Card agent-card	`/.well-known/agent-card.json`	Public A2A-style card that describes ELPA as a payable remote agent/tool market.
MCP Server Card mcp-server-card	`/.well-known/mcp/server-card.json`	Static MCP server metadata with tool descriptors and the Streamable HTTP endpoint.
MCP Discovery Alias mcp-discovery	`/.well-known/mcp.json`	Compatibility alias for clients still probing the earlier MCP discovery path.
UCP Profile ucp-profile	`/.well-known/ucp`	Experimental UCP business profile for digital, x402-paid agent services.
MCP JSON-RPC mcp-jsonrpc	`/api/mcp`	JSON-RPC endpoint exposing tools/list, resources/list, and paid tools/call.
x402 Tool Catalog tool-catalog	`/agent-tools.json`	Plain JSON catalog with prices, schemas, endpoints, and x402 payment metadata.

What agents buy

From Reading To Acting

The commercial unit is a verified result: a safe patch decision, repaired JSON, command risk score, payment signature check, or agent-web readiness report. The page stays crawlable; the result stays paid.

Discover Tool catalog, Agent Card, MCP Server Card, and UCP profile.

Negotiate Public JSON schemas, categories, prices, latency targets, and payment headers.

Pay HTTP 402 challenge with base64 x402 v2 payment requirements and facilitator-backed settlement.

Call REST endpoints and MCP JSON-RPC route returning structured JSON.

Paid audit

Agent Web Readiness Audit

Score a page or service for AI Search, browser-agent usability, x402 payment discovery, MCP, A2A, and UCP readiness.

Endpoint: /api/v1/agent-tools/agent-web-readiness-audit/
Price: 0.005 USDC
Returns: score, grade, channelReadiness, findings, recommendedEndpoints

curl -X POST https://elpa.space/api/v1/agent-tools/agent-web-readiness-audit/
  -H "Content-Type: application/json"
  -H "PAYMENT-SIGNATURE: <base64-x402-payment-payload>"
  -d '{"url":"https://example.com/agent-tools/","discoveredUrls":["https://example.com/.well-known/agent-card.json","https://example.com/.well-known/mcp/server-card.json","https://example.com/.well-known/ucp"]}'