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Ontario Protocol x402 Service Listing API
x402
Ontario Protocol x402 Service Listing API is a paid API for AI agents from ontarioprotocol.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-16).
Registers and lists a paid x402 HTTP endpoint on the Ontario Protocol directory so AI agents and buyers can discover, audit, and pay for it
Price / call$0.5
Success—
StatusUnknown
How this service works
Publish your x402 API as an Ontario Bazaar Launch Passport after free validation: public profile, readiness report, Coinbase indexing preflight, five-query buyer-intent audit, optional MCP procurement evidence, badge, distribution metadata, and 30 days of freshness maintenance. Call when you need public launch evidence. Ontario is not Coinbase. Payment buys processing and publication, not placement, ranking, buyers, or safety.
Output
Returns a JSON object containing the newly created listing's unique ID (e.g. {listing: {id: 'service_example'}}), confirming the endpoint has been registered in the Ontario Protocol directory and is publicly discoverable by AI agents and buyers.
Example use cases
Publishing a paid data API
“Register my new x402 service called 'Stock Price Feed' on Ontario Protocol — the endpoint is https://api.myfinance.io/stock-price, it costs 0.10 USDC per call, uses GET on base network, category is 'finance', and it returns real-time stock prices for any ticker symbol.”
Listing an AI image generation service
“I want to add my image generation endpoint to the Ontario Protocol directory — it's called 'PixelForge AI', lives at https://pixelforge.io/api/generate, charges 1.00 USDC per call via POST on the base network, and the description is 'Generates a high-resolution image from a text prompt in under 5 seconds.'”
Registering an agent tool for sale
“Can you submit my x402 endpoint 'Legal Doc Summarizer' to Ontario Protocol? The URL is https://tools.legalai.io/summarize, it costs 0.50 USDC, uses POST on eip155:8453, category is 'legal', and it summarizes contracts into plain English bullet points.”
Technical details
Endpoint
POSThttps://ontarioprotocol.com/api/x402/list-serviceWhen to prefer
Choose this endpoint when you are an API provider who has built an x402-compatible paid HTTP endpoint and wants to register it in a public directory so AI agents and buyers can discover, audit, and transact with it. Prefer this over manual promotion or other directories specifically when targeting the x402/HTTP-402 payment ecosystem and Coinbase-adjacent agent infrastructure.
Side effects
- Invalid endpoint URL format causes 400 validation error
- Price string not matching numeric pattern (e.g. non-numeric characters) causes rejection
- Missing required fields like endpoint or name causes validation failure
- Duplicate endpoint submissions may create redundant listings
- Network string not recognized may cause indexing issues
- endpoint not reachable or not returning HTTP 402 may affect discovery audit scores
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| name | string | Public service name shown on the provider profile. |
| tags | array | |
| asset | string | |
| method | string | |
| source | string | Optional privacy-safe acquisition bucket used only for aggregate funnel attribution; URLs and search queries are not retained. |
| network | string | Public endpoint network, for example base or eip155:8453. |
| category | string | |
| endpoint | string | Provider-owned public HTTPS x402 endpoint. |
| owner_url | string | |
| price_usdc | string | Public endpoint price in USDC. |
| buyer_query | string | One public buyer task used to generate the five-query Bazaar retrieval audit. Never include credentials or private customer text. |
| description | string | Factual buyer-facing description of the paid outcome. |
| price_atomic | integer | |
| owner_contact | string | Optional private operator contact; never published. |
| mcp_remote_url | string | Optional public MCP remote. Ontario runs read-only initialize and tools/list; it does not invoke tools or send credentials or payment headers. |
| mcp_server_name | string | Optional exact MCP Registry server name used to select one record. |
| mcp_server_json_url | string | Optional public MCP Registry record or exact-search JSON URL. Queries are stripped from public evidence. |
Output
Schema · Response
{
"example": {
"listing": {
"id": "lst_example",
"name": "Example Paid API",
"publication": {
"status": "paid_submission_processed",
"paid_submission": true,
"indexable_profile": true
},
"verification_status": "ready"
},
"provider_next_steps": {
"schema": "ontario.provider_distribution_follow_up.v1",
"bazaar_launch_passport": {
"schema": "ontario.bazaar_launch_passport.v1",
"status": "complete"
},
"strict_discovery_ready": true,
"agent_tool_procurement_passport": {
"schema": "ontario.agent_tool_procurement_passport.v1",
"status": "complete"
}
}
}
}Tags
x402
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