Agent Mercantile

Endpoints (11 live)

• POST /v1/web-change-snapshot — Determine whether the bounded normalized representation of one public HTTPS webpage has changed since a caller-held baseline. Returns fingerprints and change status, not continuous monitoring, alerts, webhooks, semantic importance, AI summaries, or site-wide crawling. (0.005 USDC on Base)
• POST /v1/transaction-gas-preflight — Return bounded factual eth_estimateGas units and recent eth_feeHistory execution-fee evidence for one unsigned Ethereum or Base transaction. Not execution, signing, custody, trading, or a guaranteed final cost. Call when you need point-in-time gas units and recent execution-fee context before signing or submitting. (0.005 USDC on Base)
• POST /v1/x402-service-change-snapshot — Determine whether a previously accepted x402 service payment contract is still equivalent enough to proceed. Compares one live unpaid 402 challenge, using a caller-supplied GET or POST request shape, against a caller-held baseline bound to that request identity. Not uptime monitoring, a trust score, a webhook, a marketplace crawl, or a generic POST {} probe of every x402 resource. (0.01 USDC on Base)
• POST /v1/bazaar-visibility — Observe whether one x402 seller resource appears in Coinbase Bazaar merchant discovery and where the exact resource sits in the first 20 results for 1–3 buyer-supplied job-language searches. Factual evidence only. Call when you need a point-in-time Bazaar presence and top-20 search observation, not a trust, SEO, or remediation score. (0.01 USDC on Base)
• POST /v1/x402-presign-handoff — Produce a normalized pre-sign evidence packet for one unpaid x402 v2 exact Base USDC EIP-3009 requirement: request identity, selected requirement including asset transfer method, public payer coverage, caller ceiling, optional baseline evidence, and an integrity digest. Non-eip3009 or incomplete transfer methods fail closed. Does not sign, pay, construct a transaction, read payment-authority allowances, or recommend whether to buy. (0.01 USDC on Base)
• POST /v1/bazaar-visibility-change — Compare one x402 resource's Coinbase Bazaar discovery visibility with a caller-held baseline: merchant presence, discovery metadata, schema metadata, visible payment fields, and top-20 position for 1–3 buyer queries. Not a VM05 replacement, direct payment-contract probe, global rank, or remediation advice. (0.005 USDC on Base)
• POST /v1/payment-authority-snapshot — Produce a factual snapshot of current x402 payment authority for one unpaid v2 requirement and one public EVM payer: selected scheme/network/asset/amount/payTo/transfer method, same-block token balance, canonical token-spender allowance when that path applies, and declared recovery-path classification. Does not sign, approve, construct a transaction, judge native gas, or recommend whether to buy. (0.005 USDC on Base)
• POST /v1/productive-venue-snapshot — Observe factual Aave V3 lending supply APR and Lido staking APR for one Ethereum/Base asset, with timestamps, evidence, explicit rate labels, optional filters/sort, and limitations. No ranking or investment recommendation. Call when you need currently observed supported-venue rates for one asset, not a ranking. (0.01 USDC on Base)
• POST /v1/allowance-exposure — Inspect one Base ERC-20 owner/token/spender allowance with same-block balance and token metadata plus factual exposure flags. No wallet access, signing, or transaction execution. Call when you need a same-block Base allowance-versus-balance snapshot for one owner/token/spender triple. (0.01 USDC on Base)
• POST /v1/url-context — Fetch deterministic, token-efficient context from one public HTTPS URL: canonical URL, title/description, headings, clean main content, structured-data types, freshness observations, evidence, and limitations. Call when you need a bounded JSON reading of one public page without a browser, login, crawl, or LLM. (0.01 USDC on Base)
• POST /v1/portfolio-preflight — Bounded Ethereum/Base wallet/portfolio holdings evidence: inventory, partial DEX pricing coverage, concentration, and evidence gaps. Pre-action evidence-readiness check for whether that evidence is sufficiently complete for downstream factual reasoning. Not guaranteed net worth, investment advice, transaction approval, or execution. (0.01 USDC on Base)