| OpenTimestamps Verify Bitcoin Verify an OpenTimestamps proof (.ots as base64, from btc-timestamp or any ots client): upgrades pending proofs from the calendars, checks each Bitcoin attestation against the real block's merkle root and returns status (confirmed, pending), block height and time, the upgraded proof, and whether your text, hash or URL matches. | agentsvc.io | - | $0.003 | listed |
| Openai Pre Ipo Fundamentals As JSON API OpenAI pre-IPO fundamentals as JSON: FY2025 revenue, monthly revenue, ChatGPT users and subscribers, March 2026 round size and post-money valuation, new round target and valuation in talks, SoftBank bond financing and stake, valuation-to-run-rate multiple. Each number has its own source URL, verification grade and value type. | vercel.app | - | $0.01 | listed |
| Openai Pricing Table API OpenAI pricing table: per-token cost of every AI model OpenAI serves, in one call — input, output, cache and batch USD per 1M tokens, ranked cheapest first, with context window and capability flags joined in. Compare LLM token cost inside OpenAI and against other providers hosting the same model. Normalized from public sources, cross-checked, refreshed hourly. | modelprices.xyz | - | $0.01 | listed |
| Openai's Latest Flagship Model API OpenAI's latest flagship model — top-tier reasoning, coding, and multimodal capabilities | x402engine.app | - | $0.035179 | listed |
| Openalex Scholarly Search API OpenAlex scholarly search: works with citations and open-access links — Genesis402 / UnyKorn Operator Network | unykorn.org | - | $0.003 | listed |
| Openapi Discovery Audit API OpenAPI discovery audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed. | halowerk.com | - | $0.001 | listed |
| Openapi Discovery Decision API OpenAPI discovery decision fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed. | halowerk.com | - | $0.001 | listed |
| Openapi Discovery Repair API OpenAPI discovery repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed. | halowerk.com | - | $0.001 | listed |
| Openrouter Pricing Table API OpenRouter pricing table: per-token cost of every AI model OpenRouter serves, in one call — input, output, cache and batch USD per 1M tokens, ranked cheapest first, with context window and capability flags joined in. Compare LLM token cost inside OpenRouter and against other providers hosting the same model. Normalized from public sources, cross-checked, refreshed hourly. | modelprices.xyz | - | $0.01 | listed |
| Operations Queue API Operations queue: produce source-backed manual next actions without guessed fixes. Reuses the existing email-list-clean motor. No SMTP probes or mailbox existence/catch-all proof. Local part case, plus and dots are never folded. Up to500 source rows;65s engine bound,70s article bound; one inflight native mail process. Price0.001 USDC plus existing motor quote, minimum0.004; supplied rows including rejected/duplicates billed. | halowerk.com | - | $0.004 | listed |
| Operator Pack API Operator pack: liveness + paygraph + drain + incidents in one pack. About one ERC-8004 agent on Base, by Agentic Finance Graph. id = token id, slug or bound wallet; an agent never seen paying is a 404 before any payment. | agenticfinancegraph.com | - | $0.10 | listed |
| Opportunities API How much open federal money is in the dataset right now? Headline aggregates: active SAM.gov contract opportunities (and how many still have an open deadline), Grants.gov opportunities by status (posted vs forecasted), and USAspending award records on file with their total dollar amount. | govparse.io | - | $0.001 | listed |
| Ops Link Integrity API Deterministic HEAD/GET check of every URL in the task; PASS/FAIL verdict with per-URL status codes. Post-deploy verification SKU (RQ-BO-DELEGATE-02). | craigmbrown.com | - | $0.01 | listed |
| Optimal Execution Smart Router API Optimal Execution Smart Router. Computes optimal gas and slippage routing paths for Base AI agents and automated executors. | onrender.com | - | $0.001 | listed |
| Optimism API Optimism (OP) price in USD now, with 24h and 7d change — Genesis402 / UnyKorn Operator Network | unykorn.org | - | $0.001 | listed |
| Options API Ranked reconstitution suggestions for one published reconstitutable compound: bacteriostatic-water presets that put the published per-administration dose range's clean steps on whole U-100 syringe marks, with doses per vial. Refuses period-denominated ranges rather than guessing a frequency. Deterministic math over published reference data -- not medical advice, not a prescription, and for relay to a human decision-maker rather than autonomous administration. | doseplot.com | - | $0.01 | listed |
| Options chain by expiry The options chain for a currency and expiry sorted by strike: bid, ask, mark, mark implied volatility, open interest, 24h volume and the underlying, plus the list of available expiries. Use it when an agent is pricing a strategy, finding liquid strikes or reading the volatility smile for a specific expiry. | agent402.tools | - | $0.004 | listed |
| Options instrument ticker One options instrument live: mark, last, bid and ask with sizes, index price, open interest, mark, bid and ask implied volatility and the full greeks (delta, gamma, vega, theta, rho). Use it when an agent holds or is quoting a specific contract and needs its current risk numbers. | agent402.tools | - | $0.002 | listed |
| Options market summary A one-call options market summary for a currency: index price, DVOL, call and put open interest with the put/call ratio, total open interest, 24h volume, a per-expiry breakdown, the most active instruments and the perp's mark, funding and open interest. Use it when an agent needs the state of BTC or ETH options before drilling into a chain. | agent402.tools | - | $0.005 | listed |
| Oracle Alert Generator API Defines a custom price/event alert and returns its current trigger state — armed, fired, or stale — not just the spec. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Reads off oracle.volatility-monitor and oracle.price-feed; this SKU is the trigger layer, not the data layer. | craigmbrown.com | - | $0.02 | listed |
| Oracle Comprehensive Report API Consolidated market/asset report combining price, volatility, sentiment, and arbitrage reads for one ticker across venues, run by crypto-market-agent-sonnet. Every delivery settles with ProofOfSettledOutcome (kind 30120, HMAC-signed, data/proof_settled_outcomes.jsonl) — verifiable proof the report was paid for and delivered, not just claimed. Broader scope than any single oracle.* SKU below; narrower and cheaper than security.massat-audit's compliance-grade evidence. | craigmbrown.com | - | $0.20 | listed |
| Oracle Cross Chain Prices API Aggregates a token's price across multiple chains and venues (DEX + CEX) into one comparable read, flagging the highest-deviation pair. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Narrower than oracle.comprehensive-report (single metric, not a full report); feeds oracle.market-arbitrage's spread detection. | craigmbrown.com | - | $0.03 | listed |
| Oracle Historical Analysis API Historical trend and pattern analysis for an asset or time series, identifying the specific pattern rather than a generic 'trending up/down' label. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Feeds crypto.investment-plays' entry/exit logic; distinct from oracle.volatility-monitor's real-time (not historical) read. | craigmbrown.com | - | $0.08 | listed |
| Oracle Market Arbitrage API Detects live cross-venue arbitrage spreads for a given asset and returns an actionable entry/exit spread, not just a price delta. Built on oracle.cross-chain-prices' price aggregation. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Pairs with crypto.investment-plays for a full execution plan. | craigmbrown.com | - | $0.10 | listed |
| Oracle Oci Pricing Table API Oracle OCI pricing table: per-token cost of every AI model Oracle OCI serves, in one call — input, output, cache and batch USD per 1M tokens, ranked cheapest first, with context window and capability flags joined in. Compare LLM token cost inside Oracle OCI and against other providers hosting the same model. Normalized from public sources, cross-checked, refreshed hourly. | modelprices.xyz | - | $0.01 | listed |
| Oracle Price Feed API Real-time price feed for a named pair and venue, with the source cited per read instead of a black-box number. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). The base data layer the other oracle.* SKUs (arbitrage, volatility, alerts) are built on. | craigmbrown.com | - | $0.02 | listed |
| Oracle Sentiment Analysis API Social + news sentiment read for a named crypto asset or topic, scored and sourced (not a raw keyword count). Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Same sentiment methodology as research.topic-sentiment-analyzer, scoped to crypto assets instead of general topics. | craigmbrown.com | - | $0.06 | listed |
| Oracle Volatility Monitor API Real-time volatility read for a trading pair with configurable alert thresholds you can act on. Settlement proof: ProofOfSettledOutcome (kind 30120, data/proof_settled_outcomes.jsonl). Complements oracle.alert-generator (fires the alert) and oracle.historical-analysis (explains the trend behind the number). | craigmbrown.com | - | $0.04 | listed |
| Orbit Decay API Uses da/dt = -rho×sqrt(mu×a)/ballistic_coefficient for a circular orbit, holds density and ballistic coefficient constant, and linearly projects altitude over a bounded horizon. Real density changes rapidly with altitude and solar activity; the result is not a lifetime prediction or maneuver plan. | halowerk.com | - | $0.004 | listed |
| Orchestrated Bundle API Orchestrated bundle: runs /linkcheck, /sitegrade, and /domain-intel (plus /email-verify if an email is supplied) and synthesizes one confidence-weighted trust verdict, explicitly flagging disagreement between sources -- e.g. a very new domain paired with an unusually mature TLS/header setup -- rather than just concatenating four outputs. Supply at least one of domain, url, or email. | tariffmonkee.com | - | $0.10 | listed |
| Orcpin Single-trade T+1 settlement date, as a one-line GET: given a trade date and an as-of date, returns the settlement date and whether it has settled, on the versioned NYSE holiday calendar with SEC Rule 15c6-1 cited. The low-integration sibling of the batch settlement-dates route — no request body. A dates fact, never a violation determination. Nothing is stored. | orcpin.dev | - | $0.02 | listed |
| Order Book Depth & Slippage Order book depth of one coin's perpetual on Bybit, Hyperliquid, dYdX, Gate, Kraken, Bitfinex, Deribit and OKX: best bid/ask, spread in bps, market depth in USD within 0.1/0.5/1/2% of mid, bid/ask imbalance, estimated slippage for your order size and the largest resting orders (walls). L2 orderbook liquidity for BTC, ETH, SOL and more. Data only. Bad input is free; under 2 venues not charged. | duoleads.com | - | $0.003 | listed |
| Order Flow Of A Crypto Or Tokenized Stock ($0.005) API Order flow of a crypto or tokenized stock ($0.005): buy and sell volume from the taker side of on-chain swaps, buy pressure, momentum, volume versus its own baseline, anomaly flags and a signal for ETHUSD, BTCUSD, NVDA, TSLA and more, windows 1m, 5m or 15m. Use to see who is in control now. | marketintelligenceapi.com | - | $0.005 | listed |
| Order Flow Snapshot API Order flow snapshot — CVD, OI, whale CVD, session levels, proximity to key levels, volume gear ratio. Live from rook-engine MMT WebSocket feed | ai-rook.com | - | $0.125 | listed |
| Order Report API Order a researched report (company brief, Israeli regulation explainer, market scan, tech comparison). Written from public sources, delivered within 24h, general information only, not advice. Poll the returned status_url. | workers.dev | - | $0.01 | listed |
| Orderbook History API 5-minute spot order book depth snapshots on 29 venues, recorded since 2026-09-15 (five venues from the start, eleven from 2026-09-20, the rest from 2026-09-22), for BTC, ETH, SOL, XRP, DOGE, ADA, LINK, AVAX, LTC and BNB: the book binned into 0.1% buckets within 20% of mid as USD notional (bids and asks as JSON arrays), 2% depth per side, coverage, level count and in_aggregate; the free /api/public/orderbook returns the live aggregate and up to 24 hours of summed history. | bykaranteli.com | - | $0.10 | listed |
| Ordinal Format a non-negative integer as an ordinal — both the suffixed form (21st) and the ordinal words (twenty-first). | openverbs.com | - | $0.002 | listed |
| Organic Bing results for a keyword — the second search engine, often different from Google Organic Bing results for a keyword — the second search engine, often different from Google | connskill.com | - | $0.10 | listed |
| Organic search competitors Find a domain's organic search competitors: rival domains ranking for the same Google keywords, each with the number of common keywords, average position, total ranked keywords and estimated organic traffic. For competitive SEO research. Empty results if none. | openverbs.com | - | $0.05 | listed |
| Organic search competitors of a domain, with keyword overlap metrics Organic search competitors of a domain, with keyword overlap metrics | connskill.com | - | $0.08 | listed |
| Organic visibility overview of a domain: keyword counts by position bucket plus estimated traffic Organic visibility overview of a domain: keyword counts by position bucket plus estimated traffic | connskill.com | - | $0.10 | listed |
| Organization Entity Audit API Organization entity audit fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed. | halowerk.com | - | $0.001 | listed |
| Organization Entity Decision API Organization entity decision fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed. | halowerk.com | - | $0.001 | listed |
| Organization Entity Repair API Organization entity repair plan fetches current public evidence from the supplied target and evaluates the documented criterion. It returns the observation, threshold, verdict, exact evidence source, limitations and a mode-specific action. The check is passive: no login attempt, payload injection, exploit, purchase, form submission or load test is performed. | halowerk.com | - | $0.001 | listed |
| Origin Rules API Checks supplied preference-origin criteria and reports the applied threshold. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice. | halowerk.com | - | $0.003 | listed |
| OrionCMD Checks OrionCMD Checks: Bulk IOC check: up to 100 domains or IPv4 (domains resolved, IPs matched too). Up to 100 comma- or newline-separated domains, URLs or IPv4 addresses in ?q=. Each domain is resolved (A) and the name, parent domains and resolved IPv4 are matched against ThreatCluster's high-confidence 30-day IOC feed (cached, refreshed hourly). No ransomware-claim lookups (use /v1/threat-check). Stale feed answers 503 before payment. | orioncmd.com | - | $0.50 | listed |
| OrionCMD Checks OrionCMD Checks: Prepaid domain threat watch: up to 25 domains for 30 days, webhook alerts. Pay once; each domain is re-checked about once a day for 30 days. You get an HMAC-signed JSON POST at your https webhook_url (event watch.changed) when a domain or its IPv4 appears in (or leaves) ThreatCluster's high-confidence IOC feed, when a new ransomware leak-site claim names it, when its A/NS/MX records change, or when registration expiry changes or falls within 30 days. A watch.created POST is sent | orioncmd.com | - | $0.30 | listed |
| OrionCMD Checks OrionCMD Checks: Certificate status from CT logs + live HTTPS probe. Issuer, validity, days left, % of lifetime used, renewal cadence and a renewal-stall heuristic from Certificate Transparency logs (NOT the live served cert), plus a live HTTPS pass/fail probe from Cloudflare's edge. | workers.dev | - | $0.01 | listed |
| OrionCMD Checks OrionCMD Checks: Domain security grade A-F with a per-category breakdown. Runs the cert, DNS, expiry, email-auth and security-header checks and scores them: TLS 25, email auth 25, HTTP headers 20, DNS (resolves, DNSSEC, CAA) 15, registration expiry 15. Returns one A-F letter, a 0-100 score, each category's points and notes, and the top fixes. Unlike /v1/site-health (raw cert/DNS/expiry data, no grade), this is a graded scorecard that also covers email auth and headers. | orioncmd.com | - | $0.03 | listed |
| OrionCMD Checks OrionCMD Checks: Email authentication posture: SPF, DMARC, DKIM, MTA-STS, TLS-RPT, BIMI. SPF validity and DNS-lookup count (limit 10), DMARC policy/pct/rua, DKIM on common selectors, MTA-STS mode, TLS-RPT and BIMI, with a rough 0-100 score and plain-English findings. Live DNS via Cloudflare DoH. | orioncmd.com | - | $0.01 | listed |