Every agent-payable API.

Electric vehicle range estimate from battery capacity, consumption and reserve - kilometers and miles

Geocode a street address or landmark to latitude and longitude - up to five ranked results with country, region and type (OpenStreetMap)

Snowpack near a western U.S. or Alaska location (SNOTEL) - snow water equivalent, depth and percent of median

Superfund sites near an address or coordinates (EPA NPL) - status, distance, hazard score and cleanup dates

Radon potential for a U.S. address or coordinates (USGS and EPA) - low, moderate or high with screening range

FDA food recall search (openFDA) - product, reason, firm, classification and status

FDA drug recall search (openFDA) - product, reason, firm, classification and status

FDA medical device recall search (openFDA) - product, reason, firm, classification and status

Film Facts: director, cast, release, runtime, box office (Wikidata). Film facts from Wikidata: release date, runtime, directors, writers, cast, genres, countries, language, composer, producers, studios, box office, budget, IMDb and Wikipedia links; disambiguate with year.

Final exam score-needed calculator from current score, target and exam weight

Solunar fishing and hunting forecast - moon phase, illumination and major and minor activity windows

Packaged food lookup by UPC or EAN barcode - name, brand, ingredients, allergens, Nutri-Score and nutrition facts

Fossil taxon lookup (Paleobiology Database) - classification, occurrences and geological age range

Freight class hint from weight and dimensions - volume, density and NMFC density class

Fundraising dilution calculator - post-money valuation and investor and holder ownership after the round

Fundraising dilution calculator - post-money valuation and investor and holder ownership after the round

GPA calculator from grade-point and credit-hour arrays - quality points, credits and GPA

GS1 SSCC-18 logistics-unit validator - check digit, payload and serial reference

Planting window dates from local frost dates and crop maturity - indoor start, transplant and harvest

Weekly EIA retail fuel prices - regular and premium gasoline and diesel, national or by area

Genealogy lookup for a notable person - birth and death, parents, spouses, children and siblings (Wikidata)

Grammar & Spelling Check (30+ languages). Grammar, spelling and style check in 30+ languages (auto-detected): each issue with message, category, position and suggested replacements, plus a corrected version of the text. Powered by LanguageTool.

Grant fit score - eligible-cost ceiling, required cash match, match gap and request-to-budget risk

Great-circle (Haversine) distance between two coordinates in kilometers and miles

Great-circle midpoint between two coordinates - latitude and longitude

Whale Signal Validation. A wallet-signal record that preserves chain event evidence, qualifies identity and control claims, classifies transfer versus trade versus contract action, normalizes size against liquidity and wallet history, and backtests whether the signal has after-cost predictive value.

Building an AI Agent That Pays for Data: A Practical x402 Walkthrough. A working implementation walkthrough for an AI agent consuming an x402-gated API: reading the 402 response and its accepts array, choosing a payment method (facilitator-settled transaction vs self-submitted reference), building the payment, and handling the settlement-lag retry loop — using this site’s own live Watchdog endpoints as the worked example.

Solana Token Authority Decoder. A procedure for producing a mint-specific Solana token authority report: resolving the exact mint and program (SPL Token vs Token-2022), decoding mint/freeze authorities, enumerating Token-2022 extensions (transfer hooks, permanent delegate, default account state, close authority), separating metadata/update authority from supply economics, and analyzing controller addresses (multisig/PDA/program) — without inferring safety from any single revoked authority.

Drained-Wallet Incident Guide. An incident-response procedure for a suspected Solana wallet compromise: stopping interaction and preserving evidence before it's lost, distinguishing key/seed compromise from a single malicious approval, creating a verifiably clean new wallet on a clean device, inventorying and safely moving remaining assets with minimum signing, rotating related accounts, and permanently retiring the compromised address rather than reusing it once "quiet."

Meteora and Orca LP Exit Resolver. A procedure for resolving a failed Meteora/Orca LP withdrawal, harvest, close, or zap-out: verifying position ownership and protocol identity, inventorying liquidity/fees/rewards/lock state and range/bin composition, reading the first failing instruction from simulation logs rather than the generic wallet error, using the official manual harvest-then-withdraw-then-close sequence instead of a risky bundled zap, and reconciling token/SOL/rent balances before…

Token Holder and Rug-Risk Analyzer. A procedure for producing a time-stamped token-risk report: classifying holder accounts (excluding pools/vaults/burn/vesting from raw wallet counts), measuring concentration and linked-wallet clusters with evidence and confidence rather than assertion, verifying liquidity custody and lock mechanisms on-chain (not by marketing claim), decoding authorities/extensions/trading restrictions, and issuing a scorecard that exposes reasons and data gaps instead of a…

Trading-Bot Profitability Auditor. A procedure for auditing whether a trading bot is genuinely profitable: defining an accounting boundary that separates deposits/withdrawals from trading PnL, reconstructing every round trip from confirmed exchange/chain records (not bot logs), computing robust metrics (expectancy, profit factor, tails, drawdown, concentration) instead of headline win rate, auditing backtests for look-ahead and selection bias, comparing predicted vs.

Forwarding Your Google Domain to a URL or IP. How to forward a Google-managed domain to another URL or IP: the Google Domains forwarding steps, choosing permanent (301) vs temporary (302) redirects and path forwarding, verifying propagation, and locating the synthetic DNS record that powers (and can break) forwarding.

Backup and Restore Drill. A recovery evidence package that maps business services to protected data, verifies backup integrity and isolation, restores into a clean environment, runs application checks, measures RPO/RTO, and records gaps and owners.

Python Environment Repair Guide. A project-local Python environment tied to the intended interpreter, installed reproducibly from declared dependencies, passing import and application tests without altering Ubuntu's system Python.

Domain and Hosting Migration Guide. A live domain moved to the intended host with complete DNS records, pre-issued TLS, low controlled TTL, validated content/forms/auth, preserved mail/services, monitored convergence, and a time-bounded rollback.

Liquidity Pool Locks Explained: What "LP Locked 100%" Actually Means. How liquidity pool locking actually works mechanically on Solana/EVM DEXs — burning LP tokens versus time-locking them in a program versus a team-controlled "lock" wallet — how to verify which mechanism a specific token used, and the fake-lock patterns that let a team drain liquidity despite an advertised lock.

Invoice, Collection, and Payment Evidence. An accounts-receivable workflow with verified parties, contract-linked line items, invoice and delivery evidence, status and aging, written reminders, dispute handling, access closure, and escalation to appropriate professional channels.

Cross-Chain Wallet Activity Monitor. A chain-aware wallet event feed that validates network and address, defines inbound/outbound/contract/approval/bridge activity, records authoritative transaction evidence, handles finality and reorganizations, and delivers normalized alerts with raw provenance.

Queue and Event Delivery Reliability. An event contract and consumer design that records immutable identity, validates schema, processes idempotently, handles ordering and retries, quarantines poison events, and reconciles producer-to-consumer outcomes.

Setting Up Chia Farming with a Raspberry Pi. How to run a Chia farmer on a Raspberry Pi 4: why Chia's Proof of Space and Time lets a low-power Pi farm (while plotting stays on a stronger machine), installing the software, creating a wallet, optimizing the Pi, pointing the farmer at plot directories, and monitoring with 'chia farm summary'.

Source Ingestion and Provenance Pipeline. A pipeline design for ingesting external data (search, RAG, paid agent responses) that preserves provenance: source authorization/license, immutable fetch evidence with checksums, deterministic parsing/normalization, quality and drift gates, and propagated correction/deletion across indexes and caches.

Progressive Web App Offline Reliability. A PWA policy and test suite that defines which assets/data work offline, versions service-worker updates, queues only safe mutations, resolves conflicts, protects sensitive caches, and proves install, update, offline, reconnect, and recovery behavior.

Productized Service Scope and Pricing. A procedure for productizing bespoke technical services: choose one painful, frequent result to standardize; define required client inputs and a readiness checklist; write deliverables as objective pass/fail acceptance tests, not activity lists; declare exclusions, revision limits, and a written change-order path; price full delivery risk including rework and support; build reusable delivery templates; then pilot with a small cohort and revise the offer…

Cache Integrity and Safe Invalidation. A cache contract that defines what is cacheable, binds entries to identity/version/authorization, exposes age, prevents stampedes, verifies invalidation, and fails safely when cache or origin is unhealthy.

Hard Drive Diagnosis: Can a 3.5-Inch Drive Run on PoE?. Why a 3.5-inch HDD can't be powered directly over PoE — the +12V/+5V and 6–10W spin-up requirements versus PoE's 48V/15.4W (or PoE+ 25.5W) budget — and the workable alternatives: PoE splitters for low-draw drives, PoE NAS units, or moving to 2.5-inch drives/SSDs.

Accessibility Remediation Guide. A prioritized set of source-level fixes that makes critical journeys perceivable, operable by keyboard, understandable, and robust with semantics, focus, labels, contrast, motion, errors, and assistive-technology verification against WCAG 2.2 criteria.

Agent Cost, Latency, and Quality Budgeting. A per-task budget policy and scorecard that predicts maximum spend and deadline, records actual contribution by step, degrades safely, and stops workflows whose expected value, quality, or remaining budget is insufficient.

Responsible Scraper Design Guide. A bounded scraper with confirmed permission/terms/robots handling, descriptive identity, rate/backoff/cache behavior, stable extraction fallbacks, provenance, validation, privacy limits, and a kill switch.

Client Qualification and Paid Discovery. A qualification record and paid discovery package that verifies identity and decision authority, defines the current problem and value, inventories constraints and dependencies, exposes risk, and produces a go/no-go proposal with testable scope.