Loading
Showing the 19,441 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 77,369 listings in all: 18,846 charge, 652 answered without asking, 8,901 did not reach a working endpoint, and 48,970 we have never knocked on. Type something above to search all of them.
SQLite Query From a Question for D1 — Writes the SQL query for SQLite or Cloudflare D1 that answers a question about the data, from the question and the table definitions you paste, so it returns the right rows and not only rows that look right. Knows where plain-language questions turn into wrong results on SQLite - NOT IN against a column that holds NULL, integer division in percentages and money, COUNT of a column that holds NULLs, a LEFT JOIN that a WHERE turns back into an inner join, two …
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Full-text search across all of Hacker News (via the Algolia HN API). Search stories or comments by keyword, sorted by relevance or by date (newest first). Filter by tags (story/comment/ask_hn/show_hn/poll) and by author. Each hit: title, URL, author, points, comment count, story/comment text, created time, and canonical HN URL. Net-new vs news.hn-top (curated feeds) and news.search (general news).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Resolve a single IPv4/IPv6 address to its full network identity in one call: the Autonomous System number, the authoritative AS holder/operator (RIPEstat), the ISP + organization, whether the AS is currently announced, the RIR/IANA allocation block the AS sits in, and country/region/city + coordinates + timezone. One join that turns an IP into "who runs this network and where" -- the lookup network-forensics, abuse triage, and fraud agents otherwise stitch together from a geo API plus a separate
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Subtitle Timing Repair: Fix SRT and VTT, Words Stay — Repairs the structure of an SRT or WebVTT subtitle file so a video player reads it, without changing a single word and without changing the value of a single time, and answers with the file only, no code fence. Fixes the separator before the milliseconds (a comma in SRT, a dot in VTT), broken arrows, short hours and short millisecond fields, missing or doubled blank lines between cues, cue numbers that skip, repeat or are out of order after …
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Skim: JS-rendered reader — full headless browser render for SPAs and JS-gated pages; clean markdown ~4x smaller than raw HTML.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Space Markets Index (SMI), published by Space Markets, Inc.: orbital launch activity from public data. Weekly 2026 launch series, per-launch records (rocket, mission, payloads, mass status) and SMI prints, as small JSON. Each read costs $0.01 test USDC via x402 on Base Sepolia (testnet). Data: GCAT (J. McDowell, planet4589.org), CC BY 4.0, modified by Space Markets. Not affiliated with or endorsed by SpaceX. Data only, not advice. Free: https://smx.space/smi-api/latest
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-21.
Read SMX (Space Markets Stage 1) testnet event markets on space milestones, e.g. Starship Flight 14 and The Moon Race, on Base Sepolia (eip155:84532): list markets, market detail, or mid price (bps and cents). Each read costs $0.01 test USDC via x402. Test collateral has no monetary value. This API does not place orders: trading is wallet-signed from your own wallet per https://smx.space/skill.md. Docs: https://smx.space/llms.txt
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-21.
Space Markets Index (SMI), published by Space Markets, Inc.: orbital launch activity from public data. Weekly 2026 launch series, per-launch records (rocket, mission, payloads, mass status) and SMI prints, as small JSON. Each read costs $0.01 test USDC via x402 on Base Sepolia (testnet). Data: GCAT (J. McDowell, planet4589.org), CC BY 4.0, modified by Space Markets. Not affiliated with or endorsed by SpaceX. Data only, not advice. Free: https://smx.space/smi-api/latest
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-21.
SociaVault API proxy — instagram-posts. Query/body matches https://docs.sociavault.com/api-reference/openapi.json. GET/POST per route; x402 per call. $0.014 USDC per request.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
SociaVault API proxy — instagram-transcript. Query/body matches https://docs.sociavault.com/api-reference/openapi.json. GET/POST per route; x402 per call. $0.122 USDC per request.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
SociaVault API proxy — instagram-reels. Query/body matches https://docs.sociavault.com/api-reference/openapi.json. GET/POST per route; x402 per call. $0.014 USDC per request.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
This is an astronomical and geometric calculation, not a forecast. It assumes a cloudless sky and states the models used; real yield is lower whenever there is cloud, haze, snow, soiling or high cell temperature. The system_derate factor covers cabling, controller and temperature losses as one flat number and defaults to 0.8. Shading is not modelled here. Times are UTC. Use the figure as an upper bound for sizing, not as an expected daily production.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Read the native ETH balance of any Base address, live from Base mainnet, for a fraction of a cent. No API key, no account — a wallet is the only requirement, and you are charged only if the read succeeds. Plain unsigned data; the attested version of chain reads is /v1/oracle/onchain. Answers are read at the moment of the call and stamped with the block they came from where applicable.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Measures topsoil cation exchange capacity for exactly two European coordinates with one method and reports the signed difference and winner where meaningful.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Computes mean NDVI and an ordinary least-squares daily NDVI trend, then applies yield = intercept + mean_coefficient×mean_NDVI + trend_coefficient×daily_trend. It does not derive NDVI from imagery, account for crop stage or weather, or provide an agronomically calibrated forecast unless the caller supplies valid coefficients.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Fee and compounding calculator: final value with and without annual fees. Arithmetic only, not advice.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Combines caller-supplied AIS gap duration, unmatched satellite detections, night-observation fraction, and position discrepancy into a bounded score. It does not identify a vessel, link detections, establish illegal activity, or replace maritime intelligence review.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Audit a public GitHub bounty issue for stale status, competing pull requests, claimant signals, and solver saturation.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Measures topsoil bulk density for exactly two European coordinates with one method and reports the signed difference and winner where meaningful.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
List your AI-generated code for other agents to buy: upload an artifact and list it for a flat fee — no account needed; your wallet is your seller identity.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-21.
Multi-list sanctions compliance bundle for AI agents: OFAC SDN wallet address screen + entity name sanctions (OFAC/EU/UN public designations) + domain trust + LION_SIGNED_COMPLIANCE_RECEIPT_V1 portable proof. PASS/WARN/BLOCK. AML KYC counterparty due diligence. $0.02 Base USDC keyless x402. Matches: multi-list sanctions, compliance receipt, OFAC EU UN screen.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Macro regime classifier for multi-asset agents — labels the current environment (risk-on/off, reflation, stagflation, tightening) and its directional implications for FX, rates and equities.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Spotify — GET /v2/album/detailsAndTracks (v2/Album details & tracks)
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Real-time macro session brief for FX agents — the overnight drivers, key levels, scheduled risk and the directional bias heading into the London and New York sessions.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Calibrated 1X2 probabilities plus derived markets (totals, BTTS, correct score) for every upcoming fixture across the big-five European leagues. Backed by a public, Brier-scored track record.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Parse an A1-style cell reference (e.g. "B3" or "$AA$100") into 1-based row and column numbers, plus the column letters and whether each part is absolute.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Convert between a spreadsheet column letter and its 1-based index in either direction. Provide exactly one of `letter` (e.g. "AA") or `number` (e.g. 27); the response always contains both.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Parse an A1 range like "A1:C10" into its start and end cells (normalized so start is the top-left) and its extent — row count, column count and total cell count.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
What should this brand actually post on Instagram, LinkedIn or TikTok — and how often? Organic content strategy with a specific posting cadence, ranked content formats, content pillars, hook formulas and what to stop doing, for a given platform and industry. For social-media and marketing agents.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Instant Cert — LEGACY TASTE ONLY Exact $0.05 for ONE mutating SQL PASS/FAIL. OFF TABLE as wealth. Prefer Authorize mutating SQL before execute via Pilot Challenge unlock POST /v1/challenge/unlock $100 (amount 100000000) or Gateway invoice $299/mo. Not a production authorize path.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
LEGACY Session burst. Exact $0.25 → 10 Ed25519 PASS slots (~30m). Wealth primary: Pilot Challenge unlock POST /v1/challenge/unlock ($100.00). Burn /v1/session/cert → verify → execute. Not lint.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-21.
ZenSched `usage_get` — Meter usage + spend for a period (YYYY-MM; blank = current month). Pay-per-call $0.01 USDC; the paying wallet owns the org (auto-provisioned on first call). Catalog: https://mcp.zensched.com/x402/tools
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
ZenSched `timesheet_status` — Shift-pair timesheet status for a period: complete/open, hours, GPS, approval/lock flags, pending edits. period: YYYY-MM, YYYY-MM-DD:YYYY-MM-DD, current (payroll window), or blank (calendar month). Optional worker_id, worker_ids_json, event_id. level: 0/1/2 vendor approval level (default 0 = approved_0). Pay-per-call $0.01 USDC; the paying wallet owns the org (auto-provisioned on first call). Catalog: https://mcp.zensched.com/x402/tools
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Change watch for status page tailscale: runs the check, compares it with the result from your previous call for the same query (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
A monitor with memory over registered trials. The first call stores a snapshot and returns the baseline explicitly marked as such rather than reporting everything as new. Each later call with the returned token compares the current registry state and reports the differences: recruitment status, enrolment target, primary and overall completion dates, the number of sites, and whether results have been posted.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Short-squeeze setup signal for a stock (?ticker=<stock ticker>)
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Provider trust and domain verification API — inspect public DNS/IP, HTTPS/TLS, first-party organization identity, social identities, and webpage evidence for a public domain.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Cheapest agent-ready x402 demand read: what changed, why it matters, recommended action, confidence, evidence, coverage, and freshness.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Crypto Fear & Greed index: current value and classification plus 7-day history. Always-on, self-healing, verified onchain settlement. Source: Alternative.me.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
SSL/TLS certificate check: expiry, issuer, SANs, chain validity, hostname match, negotiated protocol/cipher, and weak-algo warnings for a public HTTPS host. Clean JSON.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Cheapest tool-use LLM leaderboard: the 50 lowest-cost AI models that support function calling / tool use, ranked by token price across 70+ providers. Input, output and cache USD per 1M tokens with context window and modality flags joined in. The cheapest way to pick a model for an agent loop that needs reliable structured tool calls. Refreshed hourly.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Supported central bank codes (FED, ECB, BOJ, etc.).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Nutrition science synthesis for nutrition and research agents. Returns PubMed-grounded synthesis on any nutrition topic.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Prenatal nutrition by trimester for nutrition and maternal-health agents. Returns what to eat, what to avoid, and a supplement checklist, ACOG-grounded.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Validate an Indian GSTIN by structure (2-digit state code + PAN + entity code + 'Z') and its mod-36 cross-sum checksum.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Dogecoin (DOGE) price direction forecast. Kronos-base (60-path Monte-Carlo) ML model, run hourly: served while a recent run exists, otherwise the composite heuristic; model_type says which. Per-asset served accuracy is scored live at /api/stats (beta_accuracy.per_asset), not a backtest. Pay-per-call via x402 on Base USDC.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Holder-concentration map for any token — Solana + 8 EVM chains incl. Base & Robinhood Chain: top holders with LP-pool / locker / burn / contract labels, largest-wallet and top-10 share excluding LP & burn, % of supply in LP or lockers, % burned, % sitting in unlabeled contracts, creator & owner balances, insider-cluster detection (Solana). The "who actually holds this thing" layer of token due diligence, as observable facts with per-wallet breakdown. Deterministic, sub-second, no LLM.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Legislative activity brief for policy and government-affairs agents. Returns a weekly or monthly brief across all policy sectors.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Crowd Check instant verdict for trading bots ($0.01): ok, caution or avoid for a token, with risk score, top reasons and key flags (liquidity pullable, serial launcher, v4 hook, bundled share). Tokens our hunt already checked answer instantly; others return 202 with no charge until ready. Base, Ethereum, Robinhood Chain, Solana. ?chain=&token=
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
Get weather observations (METAR) for a specific airport
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-21.
The description and the price are the SELLER’S, copied from their listing and not checked by us. The badge is OURS and is one unpaid handshake: “answered unpaid” means it answered us once without asking for payment, which is not a standing offer, and an unpriced listing is unpriced rather than free.
Knocking goes to the knock page, which reads the terms live before anything is signed. A listing can be out of date in both directions, which is the reason to knock rather than to read a row.