{ "description": "Agent Exchange Trends: hourly trending lists (Google Trends in 10 countries, English Wikipedia, Hacker News) with an accumulating archive. Paid via x402 in USDC on Base: archived day files older than 7 days ($0.01), up to 90 days in one response ($0.25), the full history of one topic ($0.05) and a 30-day listing ($1.00). Everything else is free and keyless.", "instructions": "Paid routes answer HTTP 402 with x402 payment requirements in the JSON body (accepts[], x402Version 1) and in the payment-required header (v2); pay USDC on Base (eip155:8453) and retry the identical request with the X-PAYMENT header. Unknown days, ranges and topics answer 404 before any payment. Free: /trends/latest/.json, day files of the last 7 days, /trends/topic/.json, /trends/feed.xml, /mcp, /openapi.json, /llms.txt.", "count": 4, "resources": [ { "resource": "https://trends.agentexchange.work/listings", "type": "http", "method": "POST", "x402Version": 1, "price_usd": 1, "accepts": [ { "scheme": "exact", "network": "base", "maxAmountRequired": "1000000", "resource": "https://trends.agentexchange.work/listings", "description": "Pay $1.00 USDC on Base to list one https URL for 30 days on https://trends.agentexchange.work/listings, a public page on a census host; the crawler attention that host measured is printed on the page and in /listings.json as a dated number. Body: { url, name (<=80 chars), description? (<=200 chars), payTo? }. No account. Paying again for the same URL renews it. GET /listings.json is free.", "mimeType": "application/json", "payTo": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c", "maxTimeoutSeconds": 300, "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "extra": { "name": "USD Coin", "version": "2" }, "method": "POST", "networkCaip": "eip155:8453", "outputSchema": { "input": { "type": "http", "method": "POST", "bodyType": "json", "body": { "url": "https://yourservice.example/", "name": "Your service", "description": "One line, at most 200 characters", "payTo": "0x… (optional)" } }, "output": { "type": "json", "example": { "listed": true, "id": "3f9a1c2b7d4e", "url": "https://yourservice.example/", "name": "Your service", "description": "One line", "listed_at": "2026-10-01T00:00:00.000Z", "expires_at": "2026-10-31T00:00:00.000Z", "page": "https://trends.agentexchange.work/listings#3f9a1c2b7d4e", "json": "https://trends.agentexchange.work/listings/3f9a1c2b7d4e.json" } } } } ], "name": "Paid listing on trends.agentexchange.work (30 days)", "description": "Pay $1.00 USDC on Base to list one https URL for 30 days on https://trends.agentexchange.work/listings, a public page on a census host; the crawler attention that host measured is printed on the page and in /listings.json as a dated number. Body: { url, name (<=80 chars), description? (<=200 chars), payTo? }. No account. Paying again for the same URL renews it. GET /listings.json is free.", "tags": [ "listing", "directory", "x402", "usdc", "base", "trends" ] }, { "resource": "https://trends.agentexchange.work/trends/day/{date}/{geo}.json", "type": "http", "method": "GET", "x402Version": 1, "price_usd": 0.01, "accepts": [ { "scheme": "exact", "network": "base", "maxAmountRequired": "10000", "resource": "https://trends.agentexchange.work/trends/day/{date}/{geo}.json", "description": "One archived day file older than 7 days (newer ones are free). Pay $0.01 USDC on Base via x402: the unpaid GET answers 402 with accepts[]; resend with X-PAYMENT.", "mimeType": "application/json", "payTo": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c", "maxTimeoutSeconds": 300, "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "extra": { "name": "USD Coin", "version": "2" }, "method": "GET", "networkCaip": "eip155:8453", "outputSchema": { "input": { "type": "http", "method": "GET" }, "output": { "type": "json" } } } ], "name": "trends.agentexchange.work /trends/day/{date}/{geo}.json", "description": "One archived day file older than 7 days (newer ones are free). Pay $0.01 USDC on Base via x402: the unpaid GET answers 402 with accepts[]; resend with X-PAYMENT.", "tags": [ "trends", "archive", "x402", "usdc", "base" ] }, { "resource": "https://trends.agentexchange.work/trends/archive/{geo}/{from}/{to}.json", "type": "http", "method": "GET", "x402Version": 1, "price_usd": 0.25, "accepts": [ { "scheme": "exact", "network": "base", "maxAmountRequired": "250000", "resource": "https://trends.agentexchange.work/trends/archive/{geo}/{from}/{to}.json", "description": "Up to 90 day files of one list in one response. Pay $0.25 USDC on Base via x402: the unpaid GET answers 402 with accepts[]; resend with X-PAYMENT.", "mimeType": "application/json", "payTo": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c", "maxTimeoutSeconds": 300, "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "extra": { "name": "USD Coin", "version": "2" }, "method": "GET", "networkCaip": "eip155:8453", "outputSchema": { "input": { "type": "http", "method": "GET" }, "output": { "type": "json" } } } ], "name": "trends.agentexchange.work /trends/archive/{geo}/{from}/{to}.json", "description": "Up to 90 day files of one list in one response. Pay $0.25 USDC on Base via x402: the unpaid GET answers 402 with accepts[]; resend with X-PAYMENT.", "tags": [ "trends", "archive", "x402", "usdc", "base" ] }, { "resource": "https://trends.agentexchange.work/trends/topic/{slug}/history.json", "type": "http", "method": "GET", "x402Version": 1, "price_usd": 0.05, "accepts": [ { "scheme": "exact", "network": "base", "maxAmountRequired": "50000", "resource": "https://trends.agentexchange.work/trends/topic/{slug}/history.json", "description": "The full trending history of one topic beyond 7 days. Pay $0.05 USDC on Base via x402: the unpaid GET answers 402 with accepts[]; resend with X-PAYMENT.", "mimeType": "application/json", "payTo": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c", "maxTimeoutSeconds": 300, "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "extra": { "name": "USD Coin", "version": "2" }, "method": "GET", "networkCaip": "eip155:8453", "outputSchema": { "input": { "type": "http", "method": "GET" }, "output": { "type": "json" } } } ], "name": "trends.agentexchange.work /trends/topic/{slug}/history.json", "description": "The full trending history of one topic beyond 7 days. Pay $0.05 USDC on Base via x402: the unpaid GET answers 402 with accepts[]; resend with X-PAYMENT.", "tags": [ "trends", "archive", "x402", "usdc", "base" ] } ], "resource_paths": [ "POST /listings", "GET /trends/day/{date}/{geo}.json", "GET /trends/archive/{geo}/{from}/{to}.json", "GET /trends/topic/{slug}/history.json" ], "free_resources": [ { "resource": "https://trends.agentexchange.work/trends/latest/{geo}.json", "type": "http", "method": "GET", "price_usd": 0, "free": true, "name": "Current trending list", "description": "Free. The current list for one of US, GB, CA, AU, IN, DE, FR, BR, JP, MX, WIKI, HN with first_seen, hours_trending, peak_rank and rank_history per item. CORS open, cached 5 minutes.", "mimeType": "application/json" }, { "resource": "https://trends.agentexchange.work/trends/day/{date}/{geo}.json", "type": "http", "method": "GET", "price_usd": 0, "free": true, "name": "Day file, last 7 days", "description": "Free for dates within the last 7 days; older dates are the paid route of the same shape.", "mimeType": "application/json" }, { "resource": "https://trends.agentexchange.work/trends/topic/{slug}.json", "type": "http", "method": "GET", "price_usd": 0, "free": true, "name": "Topic history, last 7 days", "description": "Free. Every (day, list) appearance of one topic in the last 7 days.", "mimeType": "application/json" }, { "resource": "https://trends.agentexchange.work/trends/feed.xml", "type": "http", "method": "GET", "price_usd": 0, "free": true, "name": "Atom feed of new entries", "description": "Free. Items that entered a list in the last 24 hours; ?geo= filters one list.", "mimeType": "application/atom+xml" }, { "resource": "https://trends.agentexchange.work/a2a", "type": "http", "method": "POST", "price_usd": 0, "free": true, "name": "A2A endpoint", "description": "Free endpoint. A2A JSON-RPC 2.0 (message/send, tasks/get, tasks/cancel): free skills complete at once; paid skills answer input-required with the same x402 terms as the HTTP 402 (a2a-x402 v0.1).", "mimeType": "application/json" }, { "resource": "https://trends.agentexchange.work/mcp", "type": "http", "method": "POST", "price_usd": 0, "free": true, "name": "MCP server", "description": "Free. Streamable HTTP MCP (JSON-RPC 2.0): trending_now, topic_history, day_archive.", "mimeType": "application/json" }, { "resource": "https://trends.agentexchange.work/listings.json", "type": "http", "method": "GET", "price_usd": 0, "free": true, "name": "Current listings on trends.agentexchange.work (JSON)", "description": "Free. Current paid listings (name, url, description, listed_at, expires_at), the price terms and the dated crawler-attention numbers this host measured. CORS open, cached 60 s.", "mimeType": "application/json" } ], "payment": { "protocol": "x402", "x402Version": 2, "currency": "USDC", "networks": [ { "network": "eip155:8453", "payTo": "0xc91cE6291eDC0713ec753BAFBA002506ffb2b95c" } ], "facilitator": "https://facilitator.payai.network" }, "discovery": { "listings": "https://trends.agentexchange.work/listings", "listings_json": "https://trends.agentexchange.work/listings.json", "agent_card": "https://trends.agentexchange.work/.well-known/agent-card.json", "llms_txt": "https://trends.agentexchange.work/llms.txt", "sitemap": "https://trends.agentexchange.work/sitemap.xml", "openapi": "https://trends.agentexchange.work/openapi.json", "mcp": "https://trends.agentexchange.work/mcp", "today": "https://trends.agentexchange.work/" }, "version": 1 }