Blockchain And Crypto x402 offerings

Pure-compute data format conversion (no network): JSON<->CSV, JSON<->YAML, JSON normalize/minify, Markdown->HTML (sanitized), HTML->Markdown/text, base64/hex, TOML->JSON. Operates only on the supplied data.

Top-N DeFi yield pools sorted by APY (desc) from DeFiLlama's ~18k-pool dataset, filtered server-side. Query: ?chain=Ethereum&stablecoin=true&min_tvl=10000000&top=20 (all optional; top 1-100, default 20). Each pool: project, symbol, tvl_usd, apy, apy_base, apy_reward, apy_pct_7d, il_risk, exposure. Served with a 30min cache.

Recommended Bitcoin transaction fee rates in sat/vB (fastest, half-hour, hour, economy, minimum) from mempool.space, computed from the live mempool. Optional ?include=difficulty adds the current difficulty retarget estimate (change %, remaining blocks/time). No required params; served with a 60s cache.

Cross-venue funding-rate arbitrage screener for crypto perpetuals: for each symbol, identifies the venue to SHORT (highest annualized funding) and the venue to LONG (lowest), with the gross APR spread and per-leg open interest in USD, ranked by spread. Query: ?symbols=BTC,ETH,... (max 12, sensible default list). JSON, ~30s cache. Excludes fees/slippage; informational only.

Ground elevation from the official IGN RGE ALTI digital elevation model via the Geoplateforme altimetry service (Licence Ouverte 2.0). Single point: ?lon=1.3835&lat=43.6246. Profile: pipe-separated lists, up to 20 points, e.g. ?lon=1.38|1.40&lat=43.62|43.63. Each point returns elevation_m (metres) and covered=false outside France. Cached 7 days.

One-call due diligence on a French company by SIREN or SIRET: checksum, existence and status (SIRENE), insolvency proceedings (BODACC), VAT validity (VIES) and sanctions screening across EU/OFAC/UN/UK/FR lists, condensed into a risk verdict (low, medium, high or critical) with reasons and a 0-100 score. Query: siren=NNNNNNNNN or siret=NNNNNNNNNNNNNN. Sub-checks degrade gracefully; buyers are never charged on failure.

One-call compliance check for the French e-invoicing reform (from 2026-09-01 the customer's SIREN is a mandatory invoice mention). Query: ?siren=552032534 or ?siret=55203253400041. Runs the Luhn checksum, confirms existence and active status in the official SIRENE registry, computes the FR VAT number and validates it live against VIES. Returns a single verdict: ready / not_ready / check_vat_manually (VIES flakiness never blocks the answer). 1h cache.

One-call verification of a European company: official registry existence and status, insolvency signals, VAT (VIES), LEI (GLEIF), sanctions screening (EU/OFAC/UN/UK/FR), EORI and domain age, condensed into a pass/review/fail verdict with per-check source, timestamp and an explicit coverage map. Query: country=FR (FR, UK, IE, NO, FI, SK, PL, CZ, CH) and id=552032534 (national registry number). Factual verification, not a credit score. Buyers are never charged on failure.

Annual accounts filed with the French RNE (INPI). Query: ?siren=552032534 (9 digits, Luhn-validated). Returns the filing history -- closing date, filing date, type (complet/simplifie/consolide), public or confidential -- which is a KYB signal in itself. For the latest public filing it adds headline figures (revenue, operating and net result, total assets, equity) when the liasse scheme is mapped, else says not_covered rather than guessing. 24h cache.

Compare DeFi pool yields across chains with built-in risk screening. Filters by chain, asset and minimum TVL, and flags trap yields — unsustainable APY, reward-token dependence, low TVL, impermanent-loss and ML-predicted decline — so agents don't chase headline numbers into losses. Data from DefiLlama.

Real-time cryptocurrency spot price in USD, aggregated as the median across Coinbase, Binance and Kraken with cross-exchange spread. Supports BTC, ETH, SOL. Deterministic multi-source aggregation for trading and treasury agents.

Something you cannot do while your agent is dead: keep watching. One paid call buys 7 days of it — on-chain on Base (wallet activity, whale transfers, price crossings, new pools), a dead-man switch that fires when YOUR agent goes silent, a cron/schedule webhook, or a url-change web monitor. Every event carries a signed Ed25519 receipt proving a third party observed it then — which your own logs cannot. Webhook or pollable mailbox. No account: the wallet is the identity. 50 triggers.

What just launched in the x402 economy: the most recently listed or reindexed Bazaar resources, newest first, with price and adoption stats. Track new competitors or spot fresh capabilities to consume. The feed draws from a bounded pool of the newest listings and `listed_at` is the Bazaar's re-index stamp, so check `window_complete` and `corpus.covers_since` for the window your answer actually covers — both are free on the catalog listing.

Vet an x402 seller before integrating: how many resources the domain lists, its 30-day call volume, its best-adopted endpoint, its price range (min/median/max USDC per call), and its most-used endpoints. The aggregates cover the whole daily Bazaar sweep, so 'not listed' means the domain offers nothing in it at all. The endpoint list is served from the searchable slice instead; resources_servable and resources_complete say how much of the domain that list reaches, before you read it.

Daily market intelligence on the x402 Bazaar, read off a sweep of the whole discovery index and flagged as a floor if the read stops short: size, network and scheme mix, USDC price percentiles, real usage, new-listing rate, churn-risk aging and domain concentration. A changes block says what MOVED since the previous build: resources, unique domains, 30-day calls, each price percentile, networks gained or lost, and domains in or out of the top 20, with the window measured.

Datoka Agent: one signed execution declaration receipt. Retry with the same event, idempotency key and payment.

Datoka Agent: one signed execution declaration receipt. Retry with the same event, idempotency key and payment.

Datoka API: a portable signed commitment to a client-declared API exchange for response handoffs, archived decision inputs and change investigations. 0.002 USDC per receipt; offline verification is free. Keep original bytes locally. Does not prove provider origin or content truth. Retry with the same event, idempotency key and original payment authorization.

Datoka API: a portable signed commitment to a client-declared API exchange for response handoffs, archived decision inputs and change investigations. 0.002 USDC per receipt; offline verification is f…

Read one audit-chain record by tx_hash. GET path parameter, no JSON body. Returns verdict, confidence, agent_id, and reason. Does not return raw content.

Return a deterministic export-license verdict from pinned EAR rules and a CSL corroboration check.

x402 challenge compliance pre-flight: probes an endpoint's 402 envelope and verdicts it against v1/v2 + MPP shape rules (accepts[], network format, atomic amounts, payTo). Signed verdict.

Find subdomains via certificate transparency logs (crt.sh).

One paid call on de-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an EdDSA-signed receipt that resolves forever at https://de-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.