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Showing the 23,157 endpoints that answered our last unpaid knock, most recently knocked first. The catalogue holds 90,752 listings in all: 22,342 charge, 874 answered without asking, 9,962 did not reach a working endpoint, and 57,574 we have never knocked on. Type something above to search all of them.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Seenly Video Pitch Kit: resume to 45-60s video-pitch script (+15s cut, headline, strengths, captions)
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Does a website use Zapier? Fetches the page (homepage for a bare domain) and matches Zapier's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (automation). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
One pre-sign safety verdict (GREEN, REVIEW or BLOCK) fusing transaction, signature, address, URL and token checks for AI wallet agents.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Give this API a link to any website's sitemap.xml file and it will fetch and parse it, returning every URL found inside. If the sitemap links to other sitemaps (called sitemap indexes), it will follow and extract those too. Each URL is returned with any extra information available, such as when the page was last updated and how often it changes. Useful for SEO audits, content inventories, broken link checks, and competitive research.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Bulk does site use github pages: up to 20 domains in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Bulk does site use amazon ads: up to 20 domains in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Test whether a version satisfies a semver range (^, ~, x-ranges, ||, hyphen).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Rubric x402 service. Operated by Rubric Protocol.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
SENTINEL pre-execution safety verdict
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
TLS certificate and handshake grade for a host
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Give this API a web address and it will visit that page, then hand back everything an SEO professional needs to know: the page title, meta description, meta keywords, robots instructions, canonical link, H1/H2/H3 headings, how many links are on the page, and the HTTP status code. No setup required — just paste a URL and get structured data back in under two seconds.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Get a domain's backlink profile over time: a monthly timeseries of domain rank, total backlinks, new and lost backlinks, referring domains (new/lost/total), referring main domains, broken backlinks and crawled pages. For tracking link velocity and growth or a competitor's link building. Unknown domain returns found=false.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Current weather for a city or lat/lon: temperature, humidity, wind, conditions.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Analyze Google search results for a keyword. Returns organic results, featured snippet, People Also Ask, SERP features. Google SERP analysis for SEO and keyword research: ranking pages, featured snippet owner, PAA questions, related searches, and which SERP features appear (knowledge graph, AI overview, videos, shopping, local pack, ads), by country and language.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Google search for agents, paid per call: web, news, images, videos, places, shopping and Scholar, all returned in one shape with canonicalised URLs, duplicates removed and dates normalised to ISO. Direct answers and knowledge-panel facts included when Google has them. USD 0.005 per call in USDC — no API key, no account, no subscription, no minimum. Results are retrieved through Serper (serper.dev), which is not affiliated with or endorsed by Google.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Watchdog: 30 days of signed webhook alerts for one x402 endpoint. Settled keeps probing it and POSTs an EIP-191-signed JSON alert to your webhook whenever its status, payability, price or payTo changes (checked every 15 minutes), plus one notice at expiry. Body: {url, webhook}. Verify any alert at /v1/verify.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Buy a 24-hour day pass: one payment unlocks preflight, check, endpoints, payto, income and income/check, and every MCP tool, for 24h at up to 120 requests/min (the Watchdog, Seller Watch and the seller re-test are sold separately). Returns a bearer token to send as the x-settled-pass header.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
SIDERA Memory compiles supported Claude, Codex, Grok and Gemini JSONL logs into agent memory: reusable memory.md and lossless raw.tar.zst with source evidence. Processing: 1 MB $0.02; 100 MB $2; 1 GB $18; 5 GB+ from $75, by measured original size. Isolated container per order. This $0.001 call returns service information and ordering steps; processing is purchased separately. Sample: https://shadowharness.com/sidera/#sample
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
One paid call on sg-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://sg-cm-kg.ai/x402/receipt/{nonce}. Doctrine: https://agentic-x402.ai/.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Coerces messy text (key=value lines, CSV-ish, sentences) into clean JSON.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Real-time web search API for AI agents. Returns ranked organic results (title, link, snippet) as JSON from a resilient multi-engine metasearch (Bing, Brave, DuckDuckGo, Wikipedia, Mojeek). Pay-per-query in USDC via x402 — no signup, no API key, no rate limits. Built for agent grounding, research, RAG, fact-checking, and fresh real-world information.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Lightning-fast, enterprise-grade blockchain intelligence. Unlock real-time Base Sepolia insights with our premium block data API. Trusted by leading teams.
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-24.
Base Sepolia block number.
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-24.
Know Your Merchant (KYM) trust score: pass a merchant domain and get a deterministic 0-100 trust score with a band (high/medium/low/very_low/avoid) and human-readable reasons. Live signals: domain age from the RDAP registry of record, malware/phishing blocklist verdict via Cloudflare Security DNS, TLS certificate health, mail capability, and refund/privacy/contact page presence. The merchant-side check an agent runs BEFORE committing funds — the complement to know-your-agent.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
ShieldAPI - x402 security preflight before agents accept or store credential material
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Checks how well a Shopify store's products show up when AI shopping assistants such as ChatGPT, Gemini, Perplexity, Grok, and Copilot search for products, and reports the store's rank and its closest competitors. Searches Shopify's real Global Catalog - the same product index AI assistants read from.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Encode a word with Double Metaphone, returning a primary and a secondary code to capture alternate pronunciations (useful for non-English names).
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Compare single-seller and split baskets using supplied shipping rules, including free-shipping thresholds and delivery constraints. Estimates exclude tax and duties.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Sørensen-Dice similarity coefficient in [0,1] over character bigrams — robust to word order and minor edits.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Refresh specified variant offers and rank available offers by item price in one currency. Equivalence and landed totals are not verified.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Looks up the declared licence of each package through deps.dev and sorts the result by the only question that matters for a closed, sold product: what does this licence demand. Permissive licences need attribution. Weak copyleft affects changes to the library itself. Strong copyleft can force disclosure of the whole work on distribution. Network copyleft such as AGPL and SSPL bites on operating the software as a service, which is the sharpest case for a paid API.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Sigma OPPORTUNITY: candidate-specific completed-candle market evidence.
Unpriced in the listing, which is not the same as free. it demanded payment when we knocked, on 2026-10-24.
Quick Signal TA v3.1.0 — Crypto technical analysis. Ten indicators with natural-language assessments. Query params: token (required), timeframe, bollinger_period, rsi_period.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Parses package-lock.json, package.json, requirements.txt, go.mod and Cargo.lock and emits a bill of materials in CycloneDX 1.5 or SPDX 2.3, with a package URL per component. The distinction that decides whether the document is worth anything is made explicit: a lockfile names the versions actually installed, a manifest only names ranges, and a bill of materials built from ranges describes what might be installed rather than what is.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Individual arena strategy signal
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Individual arena strategy signal
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Fact-preserving listing formatter for Etsy, eBay and Shopify: titles, bullets, description, keyword suggestions, character checks and claim-risk flags. Rules-based, not keyword-volume research or platform compliance certification.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Ad copy and public landing-page URL to evidence-linked checks for missing offer phrases, numbers, CTA and lead-capture elements. Bounded HTML inspection, not rendered-page vision or semantic conversion prediction.
The price is the seller’s own listing. it answered us without asking for payment, once, on the day we knocked, on 2026-10-24.
Use for source-backed Item 1A risk-disclosure changes for one issuer. Pass exactly one ticker or CIK; optionally filter by materiality (HIGH, MEDIUM, LOW) and classification. A successful nonempty request returns all matching RELEASE signals from the latest eligible frozen comparison in Signal Foundry, not necessarily the issuer's latest SEC filing. $0.05 USDC per request, not per signal.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Real-time news search for AI agents. Returns recent news articles (title, link, snippet, published date) as JSON from a multi-engine news metasearch. Pay-per-query in USDC via x402 — no signup, no API key. Use for current events, breaking news, monitoring, and time-sensitive facts.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Ask any sports or prediction-market question in plain language — the front door to SignalPulse's deep engines. Returns a data-grounded answer with an explicit DATA-vs-OPINION split (every claim cites its stat), a betting or fantasy angle when relevant, and a pointer to the deepest named endpoint. Honest when a question is outside coverage — it routes, it doesn't bluff.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Get the current transaction nonce for an EVM wallet on Base (or Ethereum) via eth_getTransactionCount. Use before broadcasting a transaction.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
AI signals API for agents. Covers model releases, AI labs, robotics, benchmark updates, GPU supply, and compute capacity. Structured signals with credibility scoring. Pay-per-request via x402; free discovery available.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Polymarket odds search: prediction market questions and outcome prices for a query. Use when an agent needs prediction-market probability data.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Atomic technical indicators (RSI, EMA20/50/200, MACD, ATR, Bollinger, volume) for any Kraken */USD pair and timeframe. Cheap high-frequency poll endpoint for AI trading agents (USDC on Base). Free preview: GET /signals/preview Bad input (unknown pair) returns 400; upstream outage returns 503; you are never charged for an error.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Composite smart-money signal (insiders + Congress + institutions + analysts) for a stock (?ticker=)
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Doormat Capital Lighter perp snapshot: top markets by 24h volume, funding rate per market, cross-exchange funding spread vs Lighter.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
Decode raw EVM calldata into a named function, signature and arguments, plus security risk flags (unlimited token approval, setApprovalForAll, ownership transfer, unknown selector, native value transfer). Keyless, deterministic, no simulation - the cheap way for an agent to understand and risk-screen a piece of calldata before signing.
The price is the seller’s own listing. it demanded payment when we knocked, on 2026-10-24.
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.