Agent Utils (x402)

Caller Avoidance Score (callers-avoid-0.1, outcome-only; honesty deferred): toxicity / avoid grade for a Crypto Twitter handle from public-call follower sim (post+5m, fees). Returns avoid_score 0-100, band, components with receipts (sim_mean, sim_win_rate, rug_rate, hit_2x_24h + Wilson CI), verdict (copy_buy_loses|insufficient_sample|mixed), and public post id links — not full post text. Free when n_scored<4 via GET /v0/callers/score. Not financial advice. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/callers/score.

Daily high and low temperature for a US weather station from NWS: running provisional high/low over the station's climate day (midnight-midnight local standard time) and the official NWS Daily Climate Report (CLI) high/low once issued, flagged preliminary or final. Useful for temperature settlement, weather prediction markets and climate records. Optional temperature buckets (width/offset or explicit edges). Errors: 400 JSON {error} for invalid input. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/weather/climate-day.

ClinicalTrials.gov study lookup by NCT ID (official v2 API). Useful when an agent needs the facts of one trial. Returns titles, sponsor and collaborators, status and why stopped, key dates, phases, design, enrollment, conditions, interventions, primary outcomes, eligibility (ages, sex, criteria text), summary, site count, countries and up to 25 sites, plus results link, source URL and retrievedAt. Errors: 400 bad NCT ID, 404 not found. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/clinical-trials/study.

ClinicalTrials.gov study search (official v2 API) by condition, intervention/drug, sponsor, location, keyword, recruitment status and phase. Useful for trial finding, pipeline and competitive research. Returns total count, NCT IDs, titles, status, phases, conditions, interventions, sponsor, enrollment, key dates, has-results flag and study links, with paging token, source URL and retrievedAt. Errors: 400 invalid input. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/clinical-trials/search.

Email authentication DNS audit for a domain or email address: SPF with recursive 10-lookup count and all qualifier, DMARC policy, pct and report addresses, DKIM selector probe, MTA-STS with policy file, TLS-RPT, BIMI and MX. Useful for deliverability checks, Google/Yahoo bulk-sender readiness and spoofing risk. Returns grade A-F, score, spoofable flag, parsed records and plain-language issues. Errors: 400 invalid domain, 404 NXDOMAIN. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/dns/email-auth.

FDA adverse event report counts (FAERS via openFDA) for a drug by generic or brand name, optionally filtered by reaction, date range or serious reports only. Useful for drug safety signal checks and pharmacovigilance research. Returns total, serious, non-serious and death report counts and the top reported reactions, with source URL, FDA data date and retrievedAt. Reports do not prove causation. Errors: 400 invalid input. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/fda/adverse-events.

FDA drug label (package insert, SPL) lookup via openFDA by brand or generic name, NDC or set ID; prefers the original packager's latest label. Useful for indications, dosing, boxed warnings, contraindications, interactions and adverse reactions. Returns label metadata (brand, generic, manufacturer, application number, NDCs, RxCUI) and selected sections trimmed to max_chars, plus DailyMed link and retrievedAt. Errors: 400 invalid input, 404 no label. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/fda/drug-label.

FDA National Drug Code (NDC) directory lookup via openFDA by product or package NDC (dashed, or 10/11-digit billing format) or by drug name. Useful for pharmacy, claims and inventory data. Returns product NDC, brand and generic names, labeler, dosage form, route, active ingredients and strengths, marketing category and dates, application number, DEA schedule and packages, with DailyMed link and retrievedAt. Errors: 400 invalid input, 404 no match. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/fda/ndc.

Federal Register search for US rules, proposed rules, notices and presidential documents by keyword, agency, type and publication date, or one document by number. Useful for regulatory monitoring and compliance research. Returns title, type, action, abstract, agencies, effective and comment-close dates, docket IDs, RINs, CFR parts, citation and official HTML/PDF links, with source URL and retrievedAt. Errors: 400 invalid input, 404 unknown document. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/federal-register/search.

Known-answer x402 payment fixture for auditor and client self-tests. A paid call settles exactly at $0.001 USDC and returns the published known answer plus a signed receipt (payer, amount, tx, server time). Useful to prove a wallet and x402 client work end to end. Failed payments are not charged and return a machine-readable error. Spec: GET /v0/fixture/spec. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/fixture/settle.

Prompt-injection detection for untrusted text (web pages, emails, documents, tool output) before it reaches an LLM; a guardrail for agent pipelines. Flags instruction overrides, role spoofing, secret/system-prompt exfiltration, image beacons, tool-call markup, hidden Unicode, hidden HTML and base64 payloads. Returns a 0-100 risk score, risk level and matched rules. Deterministic rules, no LLM. JSON body {text}, max 32 KB. Errors: 400 missing text, 413 too large. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: POST /v1/text/injection-scan.

Open-source package vulnerability check via OSV.dev for npm, PyPI, Go, crates.io, Maven, RubyGems, NuGet, Packagist and more, by ecosystem+name+version, purl, or up to 10 purls. Useful before installing or upgrading a dependency. Returns vulnerable flag, count, CVE/GHSA aliases, CVSS score and severity, fixed versions and a verified upgradeTo version. Errors: 400 invalid input, 502 OSV unavailable. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/osv/package.

Product and vehicle recall lookup across US agencies in one call: NHTSA (cars, by VIN or make/model/year), CPSC (consumer products, by UPC or product name) and FDA enforcement reports (food, drugs, medical devices). Useful for safety checks before buying, selling or using a product or vehicle. Returns normalized recalls (number, date, hazard/reason, remedy, link), newest first, plus anyRecall. Errors: 400 JSON {error} for invalid input. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/recalls/check.

OFAC sanctions screening for crypto wallet addresses: exact match against every digital currency address on the U.S. Treasury OFAC SDN list (BTC, ETH, USDT, USDC, TRX, SOL, LTC, XMR and more). Useful for compliance and AML checks before paying a counterparty or an x402 payTo. Up to 20 comma-separated addresses; returns sanctioned true/false, SDN name, programs, official link and list freshness. Errors: 400 JSON {error} for invalid input. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/sanctions/address.

SEC 13F-HR institutional holdings for a filer by CIK or ticker (latest quarter or a given accession), parsed from the EDGAR information table. Useful for tracking what funds like Berkshire Hathaway hold. Returns period, holdings ranked by value with issuer, CUSIP, class, shares, put/call and portfolio percent, totals checked against the cover page, recent 13F filings and source URLs. Tables over 1.5 MB return 422. Errors: 400, 404 no 13F. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/sec/13f.

SEC 8-K current reports from EDGAR: one company's 8-Ks by ticker or CIK, or the latest 8-Ks market-wide, optionally by item code (2.02 earnings, 5.02 officer changes, 1.01 agreements) or full-text phrase. Useful for event monitoring and research. Returns company, CIK, tickers, filing date, accession number, decoded items and document and index URLs, with retrievedAt. Errors: 400 invalid input, 503 SEC rate limit busy. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/sec/8k.

SEC EDGAR company filings and financials for a stock ticker or CIK in one call: latest 10-K, 10-Q, 8-K and other forms with dates, accession numbers, primary document and index URLs, plus optional XBRL facts (revenue, net income, shares outstanding). Useful for company research, due diligence and earnings monitoring. Errors: 400 JSON {error} for an unknown ticker; 503 while the shared SEC rate limit is busy. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/sec/filings.

Pre-promo tape lookup for a Solana token when we hold a locked [-60m,0] window around its DexScreener paid-promo timestamp (specialty covered shelf). Returns raw aggregates: net buy USD, unique buyers, largest buyer share, and the same vs a matched-null mean from other covered tokens. Uncovered token: 404 with coverage:false, never fabricated. Free probe: GET /v0/solana/pre-promo-coverage. Not financial advice. PAID: $0.01 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/solana/pre-promo.

Can this wallet move USDC? Live check of the issuers' own on-chain blacklists: Circle USDC (Base, Ethereum, Arbitrum, Optimism, Polygon, Avalanche), EURC (Base, Ethereum) and Tether USDT (Ethereum), plus OFAC SDN exact match. Up to 20 EVM addresses per call. Returns PASS/BLOCK, which token+chain is frozen, block numbers and contracts read. Fails closed: if a chain cannot be read, 502 (not charged). Errors: 400 invalid address. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/wallet/stablecoin-blacklist.

Deterministic PII detect-and-redact for untrusted text (tickets, chat logs, LLM prompts) before storage or model input. Finds email, phone, US SSN, credit card (Luhn), IP, IBAN (mod-97), US ABA routing, and secret prefixes (sk-, ghp_, AKIA…). Checksum-validated; no LLM/NER. Returns findings with offsets, placeholders, redacted copy and countsByType. Optional types= filter. POST JSON {text} max 32 KB (GET ?text= max 2,000). Errors: 400 bad input. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: POST /v1/text/pii-redact.

US business days calculator: counts working days between two dates (inclusive), excluding weekends and observed US federal holidays per 5 U.S.C. 6103 and OPM rules. Useful for deadlines, SLAs, shipping and payment due dates. Returns the count and lists the holidays skipped. Errors: 400 JSON {error} for invalid input. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/calendar/us-business-days.

FREE. US federal holidays (observed dates) for a year, per 5 U.S.C. 6103. Useful to test the connection before paying.

US weather forecast, current conditions and severe-weather alerts for a latitude/longitude from the National Weather Service (NWS) in one call. Useful when an agent needs local temperature, a forecast or active alerts for a US location. Returns the latest station observation, next 12 hourly periods, 6-period forecast and active alerts as normalized JSON. Errors: 400 JSON {error} for invalid input. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/weather/us.

Web page reader for agents: fetch one public URL and get clean Markdown or text of the main content plus title, description, canonical, language, dates, headings and absolute links. Strips nav, scripts and cookie banners; follows redirects; handles JSON/text. Honors robots.txt and never bypasses logins or bot blocks. Errors are not charged: 400 bad URL, 422 robots/404/blocked, 502 unreachable. PAID: $0.001 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/web/read.

x402 endpoint validator and payment-readiness checker, useful for sellers debugging a paywall or buyers vetting an endpoint before paying. Fetches the URL unpaid, decodes the 402 challenge and grades network, USDC asset, payTo, price vs facilitator fees, EIP-712 domain, CORS and Bazaar metadata. Returns a 0-100 score and a fix list. Never pays the target. Errors: 400 JSON {error} for invalid input. PAID: $0.002 USDC per call on Base via x402 (MCP transport: retry with params._meta["x402/payment"]). Same tool over plain HTTP: GET /v1/x402/check.