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market.delegare.dev is Delegare’s agent API marketplace. It aggregates endpoints from both major agent payment discovery networks — CDP Bazaar / agentic.market (x402) and MPPScan (MPP) — into a single searchable catalog. If you build a paid API with @delegare/x402, your endpoint gets listed on Delegare Market automatically, alongside the upstream directories.

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How Listing Works

When you use @delegare/x402 with declareDiscoveryExtension, your 402 response simultaneously emits:
  • PAYMENT-REQUIRED header — x402 v2 format, read by CDP Bazaar → agentic.market
  • WWW-Authenticate: Payment header — MPP/RFC 7235 format, read by MPPScan
Delegare Market pulls from both upstream catalogs and re-indexes them with unified search, category filtering, and quality ranking. There’s nothing extra to configure — one middleware, three directories. 
@delegare/x402 middleware
        │
        ├── PAYMENT-REQUIRED ──→ CDP Bazaar ──→ agentic.market
        │
        ├── WWW-Authenticate ──→ MPPScan ──→ mppscan.com
        │
        └── Both ──────────────→ Delegare Market ──→ market.delegare.dev

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Getting Listed

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1. Add declareDiscoveryExtension to your routes

import { requireX402Payment, declareDiscoveryExtension } from '@delegare/x402';

app.post('/api/your-endpoint',
  declareDiscoveryExtension({
    description: "What your endpoint does, written for AI agents to understand.",
    inputSchema: {
      type: "object",
      properties: {
        yourParam: { type: "string", description: "What it does" }
      },
      required: ["yourParam"]
    },
    bodyType: "json",
    output: {
      example: { result: "...", costCents: 10 },
      schema: {
        type: "object",
        properties: {
          result: { type: "string" },
          costCents: { type: "number" }
        }
      }
    }
  }),
  requireX402Payment({ price: '0.10', payTo: '0xYourWallet' }),
  handler
);

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2. Trigger the first CDP settlement

CDP Bazaar indexes your endpoint after the first PAYMENT-SIGNATURE credential settles through their facilitator. The fastest way to trigger this without waiting for organic traffic: 
# In your vault/scripts directory — uses @x402/fetch with your wallet
PRIVATE_KEY=0x... node dist/cdp-payment/cdp-first-payment.js
Or make any real payment to your endpoint using an @x402/fetch-based client.

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3. Register on MPPScan

Visit mppscan.com/register and enter your server’s base URL. MPPScan reads your openapi.json and WWW-Authenticate headers for discovery — no payment required.

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4. You’re listed

Once both upstream sources have your endpoint, Delegare Market automatically picks it up on its next crawl. Check your listing at market.delegare.dev.

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Required env vars

For CDP Bazaar indexing to work (step 2), the middleware needs CDP credentials to authenticate the settlement call: 
COINBASE_API_KEY=your-cdp-key-id       # CDP API key UUID
COINBASE_API_SECRET=your-base64-secret  # Base64-encoded Ed25519 key (64 bytes)
Without these, the USDC transfer still goes through but CDP won’t write the catalog entry.

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What Agents See

A listing on Delegare Market shows agents:
  • Description — from declareDiscoveryExtension({ description })
  • Input parameters — from inputSchema.properties
  • Output shape — from output.schema
  • Price — from requireX402Payment({ price })
  • Payment methods — USDC on Base, plus fiat credit bundle if configured
  • Live endpoint URL — directly callable by agents

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Why One Marketplace Matters

DirectoryProtocolIndexed via
agentic.marketx402 v2CDP Bazaar settlement
mppscan.comMPP / RFC 7235openapi.json + WWW-Authenticate
market.delegare.devBothAggregated from both
Agents discovering via Delegare SDK, Claude, or ChatGPT tool use can search across all x402 and MPP endpoints in one query. For merchants, one middleware integration gets you listed on all three without managing separate registrations for each protocol.