ontarioprotocol.com x402 offerings

Base wallet balance for any address: ETH, USDC and about 25 widely held Base tokens, plus up to 20 ERC-20 token contracts you name, each with symbol, decimals, raw and formatted amount and the block number read, live from Base mainnet RPC. Required: address. $0.002 USDC on Base. Failed read, no charge. No account, no API key. Base mainnet only; no prices or USD values; tokens outside the list and your extras are not discovered. By Ontario Protocol.

List your paid x402 API for agent discovery: a 0.50 USDC Bazaar Launch Passport with a live readiness scan, a five-query Coinbase Bazaar retrieval audit with a rank table, a public profile with a signed JSON twin, a badge, MCP/catalog copy, and 30 days of maintenance with day-7 and day-30 Bazaar re-checks for a Base USDC endpoint. Validation is free. The fee covers evidence processing and publication, not placement, ranking, buyers, or safety.

Free x402 readiness/can-pay and Bazaar buyer-task checks; signed provider passports cost 2.00 USDC.

Which x402 API should my agent call? Live API finder for any task. Required: task. Returns up to 5 paid APIs that answered a fresh unpaid probe with a valid Base USDC 402, ranked by task fit, price and Bazaar-reported repeat buyers, each with live price, network and a ready-to-call request. Provider calls are paid separately. No live match, no charge. $0.005 USDC on Base. No account, no API key. Recommendations, not a safety guarantee. By Ontario Protocol.

Base gas price: base fee, priority fee p25/p50/p90 over the last 20 blocks, ready-to-sign maxFeePerGas and maxPriorityFeePerGas for slow, normal and fast inclusion, an L1 data-fee upper bound, and the estimated total cost in wei of an ETH transfer and an ERC-20 transfer, live from Base mainnet RPC with the block number. Required: none; optional blocks (5 to 50). $0.0015 USDC on Base. Failed read, no charge. No account, no API key. Estimates, not inclusion guarantees.

Refresh the live readiness evidence, canonical JSON profile, and badge for one existing paid Ontario x402 service listing after its included 30-day maintenance window. Payment buys a new observation,…

Publish your x402 API for agent discovery with an Ontario profile and Bazaar Launch Passport after free validation: public profile, readiness report, Coinbase indexing preflight, five-query buyer-int…

Which x402 API should my agent call? Live API finder for any task. Required: task. Returns up to 5 paid APIs that answered a fresh unpaid probe with a valid Base USDC 402, ranked by task fit, price a…

Refresh one existing paid Ontario x402 service listing: a fresh live readiness observation attached to its canonical profile, JSON twin and badge, after the included 30-day maintenance window. A free eligibility check runs at /api/x402/refresh-listing/validate. Payment buys a new observation, not a better grade, metadata edit, ranking, or traffic.

Verify a Base transaction by hash: status, block, timestamp and confirmations, with its USDC and ERC-20 Transfers decoded (token, from, to, amount; up to 100 listed, transfers_total gives the full count), any EIP-3009 authorization used, and match flags for an expected payTo and amount, so an x402 payment receipt or PAYMENT-RESPONSE can be checked. Required: hash. $0.002 USDC on Base. Transaction not found, no charge. No account, no API key. Base mainnet only. By Ontario Protocol.