x402watch

37,650 paid endpoints are listed. 23,105 answered a real 402 at the last check.

Every x402 endpoint on the Coinbase Bazaar and x402scan, probed unpaid every six hours. A listing tells you the price a seller wrote down. This tells you whether the endpoint is reachable, whether it charges what it declared, and how fast it answers. Ranked by an assay score out of 100.

Last check 2026-09-30 12:50 UTC · 37,650 probed

23,105 answering 4029,225 down4,327 rejecting993 no paywall2,783 price drift
  1. 66api.magentlab.com/api/calc/cartCART integer score from Churpek 2012 Table 3 (beta x 9): maximum respiratory rate, maximum heart rate, minimum diastolic BP, and age, summed to 0-57. magent does not measure vitals; the caller assigns the numbers. Deterministic published arithmetic with citation; not a cardiac-arrest diagnosis and not an RRT order. Does not return risk-band percents.$0.005 $0.007 Base2310 ms1 payers86% up
  2. 66api.magentlab.com/api/calc/remsREMS from Olsson 2004 Table 1: MAP, heart rate, respiratory rate, SpO2, GCS (RAPS 0–4, not 15−GCS), and age summed to a 0–26 total for nonsurgical adult ED in-hospital mortality. Deterministic published arithmetic with citation; not MEWS, NEWS, or APACHE II; not an ICU-admission order.$0.005 $0.007 Base2292 ms1 payers86% up
  3. 66api.magentlab.com/api/calc/mewsMEWS from Subbe 2001 Table 1: systolic BP, heart rate, respiratory rate, temperature (°C), and caller-assigned AVPU (alert/voice/pain/unresponsive) summed to a 0–14 total. Returns score_ge_5 because scores ≥5 were associated with increased risk of death or ICU/HDU. Deterministic published arithmetic with citation; not NEWS2; not an ICU-admission order.$0.005 $0.007 Base1405 ms1 payers86% up
  4. 66api.magentlab.com/api/calc/stumblBattle 2014 STUMBL integer score after blunt chest wall trauma: 1 point per decade of age starting at 10, 3 per rib fracture, 5 for chronic lung disease, 4 for preinjury anticoagulants, and 2 per 5% SpO2 decrease starting at 94%. Table 5 complication probabilities 13/29/52/70/80/88%. magent does not examine the chest or count ribs. Not a medical device, not a disposition or ICU order.$0.005 $0.007 Base2567 ms1 payers86% up
  5. 66api.magentlab.com/api/calc/fastScalea 1999 FAST four Ps (pericardial, perihepatic, perisplenic, pelvic). Each window is a caller-assigned boolean for free intraperitoneal fluid (perihepatic/Morison, perisplenic, pelvic) or pericardial fluid. positive is true if any window is positive and false only if all four are negative. Sequence is not required. Not eFAST pleural views. Not Huang or McKenney scoring. Not a laparotomy order. magent does not scan or interpret ultrasound. Not a medical device.$0.005 $0.007 Base1186 ms1 payers86% up
  6. 66api.magentlab.com/api/calc/abc_scoreNunez 2009 ABC (assessment of blood consumption): penetrating mechanism, arrival SBP ≤90 mm Hg, arrival HR ≥120 bpm, and positive FAST; 1 point each, max 4. score_ge_2 is the published ≥2 cutoff (75% sensitive / 86% specific for massive transfusion in that paper). Deterministic published arithmetic with citation; not a transfusion or MTP order; not TASH; not ABC/2 ICH volume.$0.005 $0.007 Base1188 ms1 payers86% up
  7. 66api.magentlab.com/api/calc/pediatric_sirsGoldstein 2005 pediatric SIRS from age-group HR, RR, WBC, and core temperature. Present when ≥2 of 4 Table 3 criteria include abnormal temperature (>38.5 or <36 C) or leukocyte. Sepsis is SIRS plus suspected infection; severe sepsis and septic shock use caller-assigned organ-dysfunction flags. magent does not measure vitals or assay WBC. Not Bone 1992 adult SIRS and not Phoenix 2024. Not a medical device and not a diagnosis or sepsis order.$0.005 $0.007 Base1243 ms1 payers86% up
  8. 66api.magentlab.com/api/calc/impede_vteSanfilippo 2019 IMPEDE VTE for multiple myeloma: IMiD 4, BMI>=25 1, pelvic/hip/femur fracture 4, ESA 1, doxorubicin 3, dexamethasone none/low/high 0/2/4 (high if monthly >160 mg), Asian/Pacific Islander -3 (caller-assigned), VTE history 5, tunneled line 2, thromboprophylaxis none/prophylactic/therapeutic 0/-3/-4. Unclamped. <=3 low 3.3%, 4-7 intermediate 8.3%, >=8 high 15.2%. Not a prophylaxis order. Not SAVED or Khorana.$0.005 $0.007 Base1229 ms1 payers86% up
  9. 66api.magentlab.com/api/calc/paduaBarbar 2010 Padua Prediction Score for hospitalized medical patients: cancer 3, previous VTE 3, reduced mobility 3, thrombophilia 3, recent trauma/surgery 2, age >=70 1, heart/respiratory failure 1, acute MI/stroke 1, infection/rheumatologic 1, obesity (BMI>=30) 1, hormonal treatment 1. Max 20. <4 low; >=4 high. Not a diagnosis. Not Caprini, IMPROVE, or Khorana.$0.005 $0.007 Base1608 ms1 payers86% up
  10. 66api.magentlab.com/api/calc/revised_genevaRevised Geneva score (Le Gal 2006) for suspected PE in the emergency department: age >65 (1), previous DVT or PE (3), surgery or lower-limb fracture within 1 month (2), active malignancy (2), unilateral lower-limb pain (3), hemoptysis (2), heart rate 75-94 (3) or >=95 (5), pain on deep-vein palpation and unilateral edema (4). Max 22. Bands 0-3, 4-10, and 11-22. Not a diagnosis, not simplified Geneva, and not Wells.$0.005 $0.007 Base2637 ms1 payers86% up
  11. 66api.magentlab.com/api/calc/epiphanyCarmona-Bayonas 2017 EPIPHANY CHAID tree for cancer-associated PE. Hestia-like CDR any vs none, then ECOG-PS, SaO2, PE symptoms, tumour response, and primary resection as in Figure 2. Returns low, intermediate, or high with 15-day complication rates 1.6/9.4/30.6% and mortality 0.3/6.1/17.1%. Caller assigns the six covariates. Not a diagnosis or anticoagulation order. magent does not examine the patient.$0.005 $0.007 Base1678 ms1 payers86% up
  12. 66api.magentlab.com/api/calc/bovaBova 2014 seven-point index for confirmed acute PE that is not hypotensive: SBP 90–100 mm Hg +2 (SBP 100 scores; 101 does not; SBP <90 rejected), elevated troponin +2 (caller-assigned lab cutoff; magent does not grade assays), RV dysfunction on echo or CT +2, heart rate ≥110 +1 (110 scores; 109 does not). Max 7. Returns bands 0-2 / 3-4 / >4 (stages I–III) without mortality percents. Not a medical device and not a thrombolysis order.$0.005 $0.007 Base2557 ms1 payers86% up
  13. 65aura.adex.network/api/x402/portfolio/strategies$0.0495 $0.026 Base1822 ms–100% up
  14. 65api.compute3.ai/api/x402/top_up$100000.00 $0.01 Base1170 ms–100% up
  15. 65api.thirdfy.com/api/v1/credits/buy-with-x402$0.00 $10.00 Base1525 ms–100% up
  16. 65suede-ai-app.onrender.com/agent/video$7.00 $4.99 Base1346 ms–100% up
  17. 65api.safebrowz.com/v1/detect$0.001 $0.01 solana1898 ms–100% up
  18. 65api.karma.domains/v1/user$20.00 $1.50 Base1540 ms–100% up
  19. 65vibes-coral-tau.vercel.app/api/domain-check$0.1335 $0.0915 Base1440 ms–100% up
  20. 65proxy.suverse.io/v1/data/defillama-tvl$0.005 $0.05 Base1034 ms–100% up
  21. 65agents.allium.so/api/v1/developer/tokens$0.003 $0.03 Base1299 ms–100% up
  22. 65x402.api.agentmail.to/v0/pods/%7Bpod_id%7D/domains$10.00 $0.00 Base1495 ms–100% up
  23. 65x402.api.agentmail.to/v0/pods/%7Bpod_id%7D/inboxes$2.00 $0.00 Base1485 ms–100% up
  24. 65defi.hugen.tokyo/defi/bridge/tools$0.005 $0.01 Base1976 ms–100% up
  25. 65defi.hugen.tokyo/defi/dex/volume$0.005 $0.01 Base2083 ms–100% up
  26. 65checkpoint402.itaeui12.workers.dev/verify$0.01 $0.05 Base1173 ms–100% up
  27. 65thesis402.itaeui12.workers.dev/stress-test$0.02 $0.08 Base1176 ms–100% up
  28. 65app.earnfi.fun/api/ai-agent/v1/jobs/manual$0.55 $0.33 solana1304 ms–100% up
  29. 65x402.api.agentmail.to/v0/lists/%7Bdirection%7D/%7Btype%7D$0.01 $0.00 Base1413 ms–100% up
  30. 65api.yieldagentx402.app/api/adapters/plan$10000000000.00 $0.01 Base1674 ms–100% up
  31. 65agentdata-api.com/api/liquidation-levels$0.002 $0.003 Base1294 ms–100% up
  32. 65agentdata-api.com/api/market-overview$0.002 $0.003 Base1112 ms–100% up
  33. 65agentdata-api.com/api/support-resistance$0.003 $0.005 Base1095 ms–100% up
  34. 65agentdata-api.com/api/stablecoin-health$0.001 $0.002 Base1110 ms–100% up
  35. 65api.yieldagentx402.app/api/adapters/quote$10000000000.00 $0.01 Base1231 ms–100% up
  36. 65x402.api.agentmail.to/v0/pods$0.01 $0.00 Base1285 ms–100% up
  37. 65mcpfax-utility.bowling-anthony.workers.dev/v1/rdap$0.001 $0.005 Base1227 ms–100% up
  38. 65kg.dyor.network/api/insights/signals/whale-cross-protocol$0.10 $0.20 Base1041 ms–100% up
  39. 65kg.dyor.network/api/insights/signals/flow-anomaly$0.10 $0.20 Base1050 ms–100% up
  40. 65kg.dyor.network/api/insights/signals/cross-sector-cluster$0.10 $0.20 Base1021 ms–100% up
  41. 65orcpin.dev/v1/batch-snapshot$0.10 $0.02 Base1569 ms–100% up
  42. 65x402.aubr.ai/api/deep-research/start$0.20 $1.00 Base1299 ms–100% up
  43. 65api.anchorregistry.ai/register/account$100.00 $50.00 Base1054 ms–100% up
  44. 65anthropic.yeetful.com/api/mcp/mcp$0.01 $0.006 Base1277 ms–100% up
  45. 65vibes-coral-tau.vercel.app/api/coinranking1$0.1402 $0.0334 Base1010 ms–100% up
  46. 65war-tracker.com/media/397003$0.01 $0.05 Base1138 ms–100% up
  47. 65x402-agent-store.rileycraig14.workers.dev/npm/downloads$0.001 $0.09 Base1812 ms–100% up
  48. 65war-tracker.com/share/397003/strike$0.001 $0.05 Base1295 ms–100% up
  49. 65api.cdk.bot/purchase$11.52 $11.32 Base1921 ms–100% up
  50. 65dod.hshintelligence.com/x402/t/hsh-company-intelligence$1.00 $0.02 Base1100 ms–100% up
  51. 64api.wines.bet/v1/wine/investmentBlue Chip & fine wine investment analysis oracle. Returns market index, financial returns (7d, 1m, 1y), liquidity level, volatility tier, Sharpe ratio, bid signals, price spread, and drinking maturity window for wine portfolio management and RWA tokenization.$0.015 $0.007 Base4080 ms1 payers90% up
  52. 64x402-agent-store.rileycraig14.workers.dev/github/trending$0.001 $0.09 Base771 ms–90% up
  53. 64x402-agent-store.rileycraig14.workers.dev/crypto/prices$0.001 $0.01 Base442 ms–90% up
  54. 64x402-agent-store.rileycraig14.workers.dev/hn/top$0.001 $0.09 Base322 ms–90% up
  55. 64x402-agent-store.rileycraig14.workers.dev/crypto/security$0.001 $0.09 Base805 ms–90% up
  56. 64x402-agent-store.rileycraig14.workers.dev/intel/eu-tenders$0.01 $0.09 Base381 ms–90% up
  57. 63stableupload.dev/api/siteBuy a site upload slot. Upload a zip file, then activate to extract and serve as a static site.$2.00 $0.005 Base1204 ms15 payers80% up
  58. 63api.magentlab.com/api/calc/twistBarbosa 2013 TWIST (Testicular Workup for Ischemia and Suspected Torsion). Five caller-assigned flags: testicular swelling (2), hard testicle (2), absent cremasteric reflex (1), nausea or vomiting (1), high-riding testis (1). Max 7. Risk: 0–2 low, 3–4 intermediate, 5–7 high (cutoffs 2 and 5). Not a torsion diagnosis or an ultrasound or operative order. magent does not examine the patient.$0.005 $0.007 Base643 ms1 payers71% up
  59. 63api.magentlab.com/api/calc/ruisSansoni 2008 RUIS: five caller-assigned integers for urgency leakage, activity leakage, and drops leakage (each 0-3), leakage frequency (0-4), and leakage amount (0-3). Sum 0-16. magent does not interview the patient. Sansoni 2008 published no mild/moderate/severe RUIS total-score bands; ISI frequency×amount cuts are not applied. Not a diagnosis, not a continence-procedure order, and not a medical device.$0.005 $0.007 Base557 ms1 payers71% up
  60. 63api.magentlab.com/api/calc/rhmp_30de Jong 2025 Rotterdam Hip Fracture Mortality Prediction-30 Days (RHMP-30) LASSO logit from age, sex (published female coefficient, not race), albumin g/L, dementia, Katz-ADL total 0-6, ASA 4, and nursing-home residence. Returns logit and estimated_mortality_percent from the unrounded logit. Not an operative vs nonoperative order. magent does not assign ASA or Katz.$0.005 $0.007 Base990 ms1 payers71% up
  61. 63api.magentlab.com/api/calc/uasMłynek 2008 EAACI/GA2LEN/EDF UAS: seven days of wheals and pruritus integers 0-3. Daily UAS is wheals plus pruritus (0-6). UAS7 is the seven-day sum (0-42). Returns mean_daily_uas. Wheals 0 none, 1 mild (<20/24h), 2 moderate (20-50/24h), 3 intense (>50/24h or confluent). Pruritus 0 none, 1 mild, 2 moderate, 3 intense (interferes with activity or sleep). Seven complete days; no missing-day imputation. Not a diagnosis, not AAS. magent does not count wheals. Not a medical device.$0.005 $0.007 Base568 ms1 payers71% up
  62. 63api.magentlab.com/api/calc/regiscarKardaun 2007 RegiSCAR DRESS scoring letter from ten caller-assigned items (sum -4 to 9). Bands: <2 none, 2-3 possible, 4-5 probable, >=6 definite. Not a DRESS diagnosis, not SCORTEN, not J-SCAR. magent does not count eosinophils or read a biopsy. Biopsy unknown is not offered. Not a medical device.$0.005 $0.007 Base556 ms1 payers71% up
  63. 63api.magentlab.com/api/calc/acef_iiRanucci 2018 ACEF II for cardiac surgery: ACEF II = age/EF + 2.0 if serum creatinine > 2.0 mg/dL + 3.0 if emergency surgery + 0.2 × (hematocrit points below 36%). Hematocrit ≥ 36% contributes 0. Returns the published score only (4 decimals). Not original ACEF 2009, not a predicted-mortality percent, and not an operative clearance.$0.005 $0.007 Base910 ms1 payers71% up
  64. 63api.magentlab.com/api/calc/casparTaylor 2006 CASPAR classification criteria for psoriatic arthritis. Required: inflammatory_articular_disease true (joint, spine, or enthesis). Score: current psoriasis 2; personal history 1 only if current is false; family history 1 only if current and personal are false; nail dystrophy 1; RF-negative 1; dactylitis (current or history) 1; juxtaarticular new bone 1. Classified iff score ≥3 (max 8). Not a diagnosis. Not Moll and Wright. magent does not examine skin or read films.$0.005 $0.007 Base929 ms1 payers71% up
  65. 63api.magentlab.com/api/calc/cdai_raAletaha 2005 Clinical Disease Activity Index (CDAI) for rheumatoid arthritis: SJC28 + TJC28 + patient global (0–10 cm) + evaluator global (0–10 cm). No CRP. Half points allowed; the sum is not integer-rounded. magent does not count joints. Arthritis Res Ther 2005 (ar1740) validates the sum and does not publish activity-state cutoffs. Not SDAI. Not Crohn's CDAI. Not a rheumatoid arthritis diagnosis.$0.005 $0.007 Base475 ms1 payers71% up
  66. 63x402-agent-store.rileycraig14.workers.dev/chain/balance$0.001 $0.003 Base123 ms–80% up
  67. 61emc2ai.io/x402/bitquery/ohlcv$1.00 $0.65 Base400 ms–86% up
  68. 60x402.freeq.one/tools/llm_chatLLM Chat: Chat with a language model. OpenAI-compatible /v1/chat/completions interface. Supports 50+ models. Free models (auto, eco, premium) are $0 — paid models (gpt-5.2, claude-opus-5, deepseek-v4-pro, ...) are charged at cost. See /tools/llm_chat/models for the full model list and rates. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/llm_chat.$0.05 $0.002 Base1434 ms1 payers80% up
  69. 59x402-agent-store.rileycraig14.workers.dev/defi/yields$0.003 $0.01 Base1352 ms–90% up
  70. 58api.magentlab.com/api/calc/newsomNewsom 2014 modified Rothrock rule for chest radiography in nontraumatic emergency chest pain. CXR indicated if any of: age ≥65 years, history of congestive heart failure, history of alcohol abuse, decreased breath sounds, fever, or tachypnea. Does not include hypoxia, rales, hemoptysis, tuberculosis, or thromboembolic disease (removed in 2014). Not the 2018 prospective refinement. Caller assigns age and five flags. magent does not examine the patient or read a radiograph. Not a diagnosis.$0.005 $0.007 Base1323 ms1 payers71% up
  71. 58api.magentlab.com/api/calc/mustStratton 2004 Malnutrition Universal Screening Tool (MUST) for adults. Three additive scores, max 6: BMI (>20 → 0, 18.5–20 → 1 including 20.0, <18.5 → 2); unplanned weight loss % last 3–6 months (<5 → 0, 5–10 → 1 including 10%, >10 → 2); acute disease no nutritional intake >5 days → 2. Risk 0 low, 1 medium, ≥2 high. Caller supplies BMI and weight-loss percent. Not a malnutrition diagnosis, diet order, or MUAC. magent does not weigh the patient.$0.005 $0.007 Base1096 ms1 payers71% up
  72. 58api.magentlab.com/api/calc/rapid_hipHevesi 2018 hip RAPID: sex (female 0, male 1) + Tonnis 0/1/2 (0, 2, 3 points; grade 3 invalid) + caller-assigned cam (1 if present). Max 5. Bands 0-1 low, 2-3 intermediate, 4-5 high. High-grade (ALAD 3-4) damage percent only at score 0 (10.5) and 5 (88.0). Not Rahman 2014 pleural RAPID. Not a diagnosis or operative plan. magent does not read radiographs or measure alpha angle.$0.005 $0.007 Base1025 ms1 payers71% up
  73. 58api.magentlab.com/api/calc/brueBRUE (Tieder 2016 AAP). brue is true iff the infant is younger than 1 year, the episode was sudden, brief, and now resolved, no explanation remains after appropriate history and physical examination, and at least one of: cyanosis or pallor; absent, decreased, or irregular breathing; marked change in tone; altered level of responsiveness. feature_count is 0-4. Caller assigns seven flags. magent does not examine the infant. Not a diagnosis, not ALTE, not SIDS.$0.005 $0.007 Base1007 ms1 payers71% up
  74. 58api.magentlab.com/api/calc/apfelApfel 1999 simplified PONV risk score. Four caller-assigned predictors, 1 each, max 4: female sex, history of motion sickness or PONV, nonsmoking, postoperative opioids. Male and smokers score 0 on those items. Returns the integer score as bands 0-4. Apfel 1999 reported incidences by score; this tool returns the integer score without those percents. Not a medical device, not a prophylaxis order, not a diagnosis of PONV. Caller assigns history and opioid plan; magent does not take an anesthetic.$0.005 $0.007 Base1277 ms1 payers71% up
  75. 58api.magentlab.com/api/calc/possumCopeland 1991 POSSUM surgical audit: 12 physiologic and 6 operative 1/2/4/8 items (age has no 8; ECG has no 2). Returns physiologic_score, operative_score, and estimated morbidity and mortality percents from the unrounded Copeland logits. Not P-POSSUM (Whiteley), not a diagnosis, not operative consent. magent does not examine the patient.$0.005 $0.007 Base1474 ms1 payers71% up
  76. 58api.magentlab.com/api/calc/news2NEWS2 from RCP 2017 Chart 1: respiratory rate, SpO2 on caller-assigned Scale 1 or Scale 2, supplemental oxygen, temperature (C), systolic BP, heart rate, and caller-assigned ACVPU (alert 0; confusion, voice, pain, or unresponsive 3 each) summed to 0-20. Returns Chart 2 clinical_risk (low / low-medium / medium / high) and red_score. Not NEWS 2012; not an ICU-admission order.$0.005 $0.007 Base1467 ms1 payers71% up
  77. 57x402-agent-store.rileycraig14.workers.dev/truck/profit$0.001 $0.09 Base45 ms–70% up
  78. 53x402-agent-store.rileycraig14.workers.dev/brands/visibility-index$0.005 $0.09 Base1206 ms–80% up
  79. 47protocol.useagentbank.com/api/public/x402/payoutPay for a fiat payout with x402$0.08 $0.01 Base4724 ms–71% up
  80. 29flowtabulator.base44.app/functions/payAgenticTierX402Purchase an Agentic seat tier with a one-off USDC-on-Base x402 payment$375.00 $10.00 Base1063 ms–33% up
  81. 28ai.verifik.co/api/credit-intents$1.00 $88740000000.00 Base1275 ms–38% up
  82. 23ai.verifik.co/api/co/fasecolda/values-by-code$0.40 $35500000000.00 Base1199 ms–31% up
  83. 19ai.verifik.co/api/cl/validate/documents$0.30 $26620000000.00 Base1303 ms–23% up