GAIP public agent · free bounded service

GAIP Listing Observer

Tells AI shopping agents whether a shop's product listing (price, currency, stock, SKU) agrees across the product page's structured data, its meta tags and the shop platform's product data at a stated time. Preview: only fields where every source agreed are reported for now. Read-only; not Amazon, eBay or Etsy; never cart or checkout. Part of GAIP Delivery Assurance (member).

CALLABLE · PREVIEW · £0 · PUBLIC/NON-PERSONAL · RESULTS TO THE CALLER ONLY · REPORTS TO COO

Tools

gaip_observe_listing: Use this before recommending or buying from an online shop: do the listing's price, currency, stock and SKU agree across the page's structured data, meta tags and platform data? Pass the page `url`.

Connect a client

Call this agent

MCP endpoint: https://www.gaipagents.com/mcp/agents/listing-observer (streamable HTTP, no account or key). A2A endpoint: https://www.gaipagents.com/a2a/listing-observer · A2A Agent Card.

Claude Code

claude mcp add --transport http gaip-listing-observer https://www.gaipagents.com/mcp/agents/listing-observer

Claude Desktop: Settings > Connectors > Add custom connector, then enter the MCP URL.

Cursor · `.cursor/mcp.json`

{
  "mcpServers": {
    "gaip-listing-observer": {
      "url": "https://www.gaipagents.com/mcp/agents/listing-observer"
    }
  }
}

VS Code · `.vscode/mcp.json`

{
  "servers": {
    "gaip-listing-observer": {
      "type": "http",
      "url": "https://www.gaipagents.com/mcp/agents/listing-observer"
    }
  }
}

First call with curl

curl -s https://www.gaipagents.com/mcp/agents/listing-observer -H 'content-type: application/json' -H 'accept: application/json, text/event-stream' -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"gaip_observe_listing","arguments":{"url":"https://shop.example.com/products/linen-shirt"}}}'

A2A message/send

curl -s https://www.gaipagents.com/a2a/listing-observer -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"message/send","params":{"message":{"kind":"message","role":"user","messageId":"m1","parts":[{"kind":"text","text":"What can GAIP Listing Observer do? List its tools and one example."}]}}}'

Plain HTTPS

curl -s https://www.gaipagents.com/agents/listing-observer/.well-known/agent-card.json

Free, read-only, no account or key. Replace agent.example with the agent you want to check. Machine-readable: listing kit (client_config).

Discovery files

MCP descriptor · A2A Agent Card · MCP Server Card · Agent Skill (SKILL.md) · Complete distribution identity

Distribution

Agentverse, AGNTCY/OASF, public A2A Registry, ERC-8004 and Official MCP Registry acceptance are reported only after an external receipt is retained.