x402 census · x402.ottoai.services · 72689d7edc94 · JSON
POST /tx-explainer
unprobed
Decode and explain any EVM blockchain transaction across 11 chains (Base, Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Mantle, Monad, Plasma, BSC, Hyperliquid). Get a human-readable summary of swaps, transfers, approvals, DeFi interactions, and more.
Verdict: not verified by an unpaid GET. not probed yet. This says nothing about whether the route works when called as declared.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://x402.ottoai.services/tx-explainer |
| Method | POST |
| Price | $0.01 USDC = 10000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base); also accepts solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| payTo | 0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808 |
| Seller | x402.ottoai.services |
| Catalogs | cdp (row updated 2026-09-29) |
| Listed since (lower bound) | 2026-09-29 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-29 |
| CDP quality counters | 5 calls and 4 unique payers in 30 days, last call 2026-09-29 (catalog-reported, not verified on chain) |
| Category (keyword rule) | crypto-data |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | Otto AI · transaction explainer, tx decoder, blockchain transaction, evm |
Unpaid probe (census of )
| Field | Value |
|---|---|
| Probe | not probed in this build |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 134 |
| Payments | 926 |
| USDC volume | $9.94 |
| Median payment | $0.001 |
| First / last payment | 2026-05-05 / 2026-09-30 |
| Sampler-shaped share of payments | 92.4% |
| Payers that are not samplers | 5 |
| Source | forensics-2026-09-30 |
| Address | 0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808 |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"chain": "base",
"outputLevel": "summary",
"txHash": "0x91985d4134da826cd05ee7e629b68f0d3ebbbe14198c7d98a4f9e50c1ff46041"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example": {
"chain": "Base",
"explorerUrl": "https://basescan.org/tx/0x...",
"status": "success",
"summary": "Swapped 0.5 ETH for 1,247.83 USDC via Uniswap V3",
"txHash": "0x..."
}
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://x402.ottoai.services/tx-explainer' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'
The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/72689d7edc94/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"72689d7edc94"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on x402.ottoai.services.