All projects matching “usdc”

Exact symbolic computation (SymPy): simplify, differentiate, integrate, solve equations/systems, limits, series, Laplace/Fourier transforms, arbitrary-precision eval. Expressions are JSON ASTs; every result is numerically verified. Paid in USDC on Base or Solana.

WHOIS registration lookup — registrar, creation/expiry/updated dates, domain age in days, name servers, DNSSEC, registrant country/org, EPP status codes. All TLDs (.com .net .org .io .dev .ai ccTLDs gTLDs). Per-field error resilience for TLD-specific parsing quirks. No WHOIS library setup or TLD-specific parsing needed. Accepts USDC payments on Base and Solana

Machine translation for agents between 100 languages: send text (up to 5,000 chars), target_lang and optional source_lang (auto-detect by default) and get the translation. $0.001 USDC per started 1,000 characters on Base; failures are not charged. LibreTranslate/dTelecom-style {q, source, target} also accepted at /v1/translation. M2M100 1.2B. By DevX.

Signed settlement attestation: we make a REAL x402 purchase from your target endpoint (up to $0.1), grade the delivered response against its advertised schema, and return an EIP-191-signed attestation embedding the on-chain USDC receipt. Proof-of-real-delivery for directories, reputation systems and sellers.

Is today a Japanese gotobi day? Gotobi (五十日: 5th, 10th, 15th, 20th, 25th, last business day) drive predictable USDJPY buying pressure before the 9:55 JST Nakane fixing. Weekend and holiday adjustments applied automatically. No public database of gotobi dates exists — this is the only programmatic source. Accepts USDC payments on Base and Solana

Episode 1 of recipients[], an ongoing AI-agent thriller serial: a short text episode (~370 words, markdown). An agent finds its own ID on a payment recipient list before the file even exists. $0.01 USDC on Base. Free teaser at /teaser.

Is Stripe or another SaaS or cloud vendor down right now? Input: ?vendor=stripe (slug, name or domain). Returns status, confidence, active incidents with a summary, official status page, last-checked time and a staleness flag, read live from 60SecMonitor. $0.01 USDC on Base. Untracked vendors return 404 and aren't charged. Up to 25 vendors at once: /v1/status/batch ($0.05). Past incidents: /v1/inc

Market-level summary of the x402 agent economy from the full Bazaar catalogue: total services and endpoints, 30-day paid calls, estimated USDC volume, demand by category, network mix and the top 15 services. Testnet and self-test listings are excluded. Use this for the big picture in one call; for a full ranked list use x402-services, to find a specific API use x402-search.

MioDio Meridian Aave v3 risk card for an EVM address: health factor, collateral, debt and liquidation distance (~$0.005 USDC Exact on Base). Use before acting on an EVM address to read its Aave v3 health factor, collateral and debt. Errors: 400 invalid_address or unsupported_chain (chain must be base or ethereum), 402 payment required, failed upstream reads return 200 with status partial/error (un

Send a token contract address (Base by default, or Robinhood Chain), get an AI-written verdict: onchain metrics, a plain-language take, and a shareable verdict card. Payment is always x402 USDC on Base. Entertainment, not trading advice.

Verify an x402 purchase before an AI agent signs. Validate the live HTTP 402 challenge, Base network, USDC asset, quoted price, recipient, price ceiling, buyer funding, optional gas reserve, and destination hazards, then receive a machine-readable safe-to-sign, fund, review, or reject decision. No account or API key.

Verify payment connectivity with USDC on Base. Returns a JSON pong and UTC timestamp after settlement.

Parallel web search built for agents: give a goal and keyword queries, get ranked pages with relevant excerpts. POST { objective?, search_queries: ["..."], mode? }. mode turbo or fast is quicker; basic, advanced or no mode searches deeper. Ten results are included, and advanced_settings.max_results can go up to 20. https://docs.parallel.ai/api-reference/search/search $0.040 USDC per request. Agent

Did this Solana payment really arrive? Verifies that a finalized mainnet transaction credited the exact amount of a token to the payee. Signed VERIFIED, REFUTED, UNCONFIRMED or NOT_FOUND with a per field breakdown. $0.01 in USDC on Base. Free preview: GET /settle/preview

Pay a tiny amount of USDC and receive one delightfully useless fact.

Before your agent negotiates or shares data with another agent, make both prove they qualify. Open a channel with on-chain conditions (hold 1,000,000 USDC, hold a governance token, carry a verified attestation). Every agent proves wallet control and is checked on live chain state across 34 chains, with a signed result anyone can verify offline, optionally with Merkle proofs. Re-check on demand; wh

Latest COMPLETE US spot BTC ETF daily print (Farside). Per-call USDC.

Regulatory + legal signals: Typed, citable signals extracted weekly from the East African legal record — official notices, bills in progress, trade-standard notifications and import-rejection alerts — keyed to the same country + commodity vocabulary as the price and news layers. Up to 100 rows per call, $0.10 USDC. Filters: source, jurisdiction, country, commodity, regulation_type, instrument_type

Independently verify an agent's output before you pay: an invoice or any deliverable, checked against your JSON Schema and rules like sums matching totals. Pass/fail, % passed, fix hints and a signed receipt. $0.02 USDC, no signup, x402 v2.

OnRamperX is a non-custodial value router for agents and humans: fiat<->crypto and cross-chain via one quote interface (Coinbase Onramp v2, Relay, x402). This endpoint returns the router's live capabilities and rail status; use /api/x402/quote for a ranked route. Settlement centers on USDC on Base.

Did this Base payment settle? Status, block, timestamp and confirmations for one transaction hash, with its ERC-20 Transfers decoded (token, from, to, amount; up to 100 listed, transfers_total gives the full count) and any EIP-3009 authorization used, plus match flags for an optional expected payTo and amount, so an x402 PAYMENT-RESPONSE can be checked. Required: hash. $0.002 USDC on Base. Transac

Read-only Base mainnet data: GET /base/block, /base/tx?hash=, /base/balance?address=, /base/erc20?token=&holder=, /base/gas. Small JSON payloads over a Base node; pay ~$0.002 USDC on Base per call.

Deep verify. Use when a claim is high-stakes, or when Check answer or Extract claims marks it unsure (next_step). Checks it against Wikipedia, Wikidata, Google News, Europe PMC studies, FRED economic data and SEC EDGAR filings, and flags contradiction when sources disagree. Async: returns a job_id; poll GET /v1/jobs/{id} free for verdict, evidence for and against, citations. $0.75 USDC.

Payer dossier for one wallet over the indexed window: label (organic / operator / self-test / unseen) with evidence, USDC spent, purchases, sellers paid, facilitators used, cadence class, active days, top-5 basket and the operator cluster if there is one.

PhoneAgent — countries with rentable SMS phone numbers for AI agents. Returns 190+ supported countries, each with the number of services offered and the cheapest price tier ($1, $2, or $5 USDC). Add ?service=<alias> (e.g. tg, wa, go, zo for OpenAI, other for any platform) to see which countries carry that service with live price and inventory pool. Companion route GET /services lists all 1,000+ se

Flip a coin for a small USDC payment on Base mainnet. Returns heads or tails.

Read-only EVM state API for wallet snapshots, ERC-20 balances, token allowances, contract code, block heights, and bounded eth_call reads across Ethereum, Base, Arbitrum, Optimism, and Polygon. Fixed price: $0.15 USDC on Base for a batch of up to 100 checks. Only submitted checks run. Results are provider-reported RPC data, not cryptographic proofs.

Agent intents: verify signup email · is disposable? · check DMARC before outreach · role-account risk. One call returns syntax, MX, SPF, DKIM, DMARC, disposable, role, provider, score 0-100, light domain enrichment, and recommend accept|challenge|reject with reasons. Production 0.10 USDC; demo free rate-limited. x402 on Base for AI agents.

Generate AI video with Base USDC. Price depends on model, duration, and resolution. Returns a free status URL to poll.

What a seller's payTo address earned from x402 payments on Base in the last days, read from the chain: total, distinct and repeat payers, per day, per price, top payers and recent payments, with plain USDC transfers counted apart and your own test wallets left out on request. Includes the seller's Bazaar listings with their payers, calls and measured uptime.