x402 Listing Quality Teaser
Top 3 x402 resources by heuristic calls-vs-unique-payers pattern score from the CDP Bazaar and PayAI catalogs, with host, resource, unique_payers, calls and wash_risk (a heuristic score, not a finding about any seller). No input. Full scored list: /v1/listing-quality ($0.01).
- Category
- Crypto & DeFi
- Starting price
- $0.01
- Paid calls · 30 days
- 182
- Unique payers · 30 days
- 177
Paid endpoints
148 endpoints, sorted by usage. Prices are per request.
- GET/v1/3pl-fee-comparator
Monthly 3PL cost for two fee schedules.
$0.01Base1calls / 30d - GET/v1/creator-cpa-emv-calc
Cost per acquisition, CPM and earned media value.
$0.01Base1calls / 30d - GET/v1/early-payment-discount-apr
Annualized cost of forgoing a trade discount.
$0.01Base1calls / 30d - GET/v1/factoring-po-financing-apr
Effective APR of factoring fees.
$0.01Base1calls / 30d - GET/v1/cash-conversion-cycle
CCC and cash freed by improvements.
$0.01Base1calls / 30d - GET/v1/walmart-pro-seller-check
Check Walmart Pro Seller performance thresholds.
$0.01Base1calls / 30d - GET/v1/container-cbm-load-optimizer
Cartons per 20ft/40ft/40HC by volume and weight.
$0.01Base1calls / 30d - GET/v1/cold-chain-spoilage-risk
Expected spoilage loss from excursion probability.
$0.01Base1calls / 30d - GET/v1/eoq-holding-cost-optimizer
Economic order quantity and annual cost.
$0.01Base1calls / 30d - GET/v1/bullwhip-effect-scorer
Order variance amplification ratio.
$0.01Base1calls / 30d - GET/v1/supplier-otif-scorecard
On-time in-full % and chargeback exposure.
$0.01Base1calls / 30d - GET/v1/bom-cost-rollup
Roll up material, labor and overhead with scrap.
$0.01Base1calls / 30d - GET/v1/scrap-yield-loss-calc
Rolled throughput yield and cost of scrap.
$0.01Base1calls / 30d - GET/v1/prop65-warning-check
California Prop 65 safe-harbor warning validator & 2025/2026 short-form chemical-naming rules. Pass ?chemical_class=phthalates|lead|bpa|acrylamide|cadmium (default phthalates) & optional ?exposure_route=consumer_product|food|apparel. Returns short-form/long-form templates, NSRL/MADL thresholds, symbol rules, and 60-day-notice defense checklist. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/fda-cosmetic-inci-check
FDA cosmetic labeling (21 CFR 701/740) & MoCRA adverse-event contact / INCI declaration order checker. Pass ?category=skincare|haircare|fragrance|color_cosmetic (default skincare) & optional ?claims=<marketing text>. Returns required PDP/info panels, >1% vs <=1% INCI rules, drug-claim red flags, compliant rewrites, and MoCRA checklist. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/ftc-made-in-usa-check
FTC Made in USA Labeling Rule (16 CFR Part 323) 'all or virtually all' standard evaluator. Pass ?us_content_pct=95&final_assembly_us=true&claim_type=unqualified|qualified. Returns risk verdict, unqualified eligibility, approved qualified claim templates ('Made in USA of U.S. and imported parts'), civil penalty notes, and BOM audit checklist. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/ftc-green-guides-check
FTC Green Guides (16 CFR Part 260) & CA SB 343 / AB 1305 environmental marketing claim checker. Pass ?claim=recyclable|biodegradable|compostable|carbon_neutral|recycled_content (default recyclable). Returns substantiation thresholds (60% access rule for recyclable, 1-year rule for biodegradable), compliant phrasing, and deceptive traps. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/ce-marking-doc-check
EU CE marking, Declaration of Conformity (DoC) mandatory fields, and EU GPSR Economic Operator checklist. Pass ?directive=emc|lvd|red|rohs|toy_safety (default emc). Returns directive code, harmonized EN standards examples, Notified Body vs Module A self-declaration rules, 8 mandatory DoC elements, and 10-year retention rules. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/ukca-conformity-check
Great Britain UKCA & indefinite CE mark recognition conformity checker. Pass ?product_group=electronics|toys|machinery|ppe (default electronics). Returns applicable UK Statutory Instruments, GB CE recognition status, BS designated standards, UK importer postal-address labeling duties, and Northern Ireland Windsor Framework rules. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/rohs-reach-material-check
EU RoHS 3 (10 restricted substances) & REACH Candidate List SVHC (>0.1% w/w SCIP notification) material screening guide. Pass ?material=pvc_cable|solder_alloy|brass_fitting|silicone_housing|plated_steel (default pvc_cable). Returns max concentration thresholds, material-specific failure modes, exemptions (e.g., 6c brass), and IEC 62321 lab test methods. Educational reference only; not legal advice
$0.01Base1calls / 30d - GET/v1/fcc-part15-label-check
FCC Part 15 (47 CFR 15.19 / 15.105) equipment authorization and labeling checker. Pass ?device_class=unintentional_class_b|unintentional_class_a|intentional_radiator (default unintentional_class_b). Returns SDoC vs TCB Certification path, FCC ID & modular rules, mandatory user-manual statements, US Agent / Responsible Party rules, and e-labeling rules. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/textile-fiber-label-check
FTC Textile Fiber Products Identification Act (16 CFR 303) & Care Labeling Rule (16 CFR 423) validator. Pass ?composition=80_cotton_20_polyester&country_of_origin=VN. Returns formatted descending fiber line, <5% fiber disclosure rule, 'Exclusive of Decoration' threshold, RN number usage, neck-label origin placement, and care symbol rules. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/amazon-restricted-keywords
Amazon Seller Central ASIN suppression keyword linter for FDA DSHEA disease claims, EPA FIFRA pesticide triggers, and OTC drug flags. Pass ?category=supplements|topicals|electronics|home_goods (default supplements) & optional ?text=<bullet/title copy>. Returns matched trigger words, suppression cause, compliant structure/function rewrites, and TIC lab docs.
$0.01Base1calls / 30d - GET/v1/shopify-aup-risk-check
Shopify Acceptable Use Policy & Shopify Payments underwriting/reserve risk checker. Pass ?vertical=wellness|digital_goods|nutraceuticals|knives_outdoors (default wellness). Returns prohibited vs restricted status, payout-hold trigger signals, reserve mitigation steps, and mandatory storefront disclosures.
$0.01Base1calls / 30d - GET/v1/etsy-handmade-policy-check
Etsy Creativity Standards ('Made by', 'Designed by', 'Handpicked', 'Sourced') & Production Partner disclosure checker. Pass ?role=designer|maker|curated_vintage|craft_supply (default designer). Returns eligibility rules, production-partner disclosure requirements, prohibited reselling triggers, and design-proof audit checklist.
$0.01Base1calls / 30d - GET/v1/ebay-vero-risk-check
eBay VeRO (Verified Rights Owner) intellectual-property takedown & nominative fair-use checker. Pass ?usage=compatibility_fitment|oem_replacement|refurbished|pre_owned (default compatibility_fitment). Returns safe title templates ('Compatible with [Brand]'), prohibited brand-misuse patterns, stock-photo copyright rules, and warranty material-difference traps.
$0.01Base1calls / 30d - GET/v1/walmart-wfs-prep-check
Walmart Fulfillment Services (WFS) inbound packaging, polybag suffocation warning (>=5 in opening), and GTIN/UPC barcode prep checker. Pass ?packaging=polybag|case_pack|fragile_glass|apparel (default polybag). Returns mil thickness rules, carton weight/length caps, barcode placement rules, and top receiving rejection causes.
$0.01Base1calls / 30d - GET/v1/tiktok-shop-claim-check
TikTok Shop US prohibited exaggerated/medical claim & creator violation-point guardrail checker. Pass ?vertical=beauty|health_wellness|gadgets|fashion (default beauty). Returns prohibited live-stream/video claims (instant results, weight-loss numbers, brand-dupe audio), compliant script rewrites, and Account Health Rating (AHR) enforcement notes.
$0.01Base1calls / 30d - GET/v1/meta-ad-policy-check
Meta Ads Policy personal-attributes rule & Special Ad Category pre-flight checker. Pass ?vertical=health_beauty|personal_finance|housing_employment|ecommerce (default health_beauty). Returns Special Ad Category triggers, banned 'you/your condition' personal-attribute patterns, compliant hook rewrites, and landing-page parity checks.
$0.01Base1calls / 30d - GET/v1/google-merchant-gtin-check
Google Merchant Center `gtin`, `mpn`, `brand`, and `identifier_exists` feed attribute matrix. Pass ?condition=new|refurbished|custom_handmade (default new) & ?has_gtin=true|false (default true). Returns exact feed attribute values to submit, GS1 company-prefix cross-check rules, and fixes for 'Invalid value [gtin]' or 'Incorrect identifier_exists'.
$0.01Base1calls / 30d - GET/v1/stripe-restricted-mcc-check
Stripe Prohibited & Restricted Business list, MCC classification, and underwriting readiness checker. Pass ?business_model=saas_ai|marketplace|dropshipping|supplements (default saas_ai). Returns restricted status, likely MCC code, rolling-reserve triggers (prepayments, money-transmission traps), and mandatory checkout/website readiness items.
$0.01Base1calls / 30d - GET/v1/chargeback-reason-code-guide
Card network dispute reason code lookup & Visa Compelling Evidence 3.0 (CE3.0) rebuttal guide. Pass ?network=visa|mastercard|amex (default visa) & ?code=10.4|13.1|13.3|4853 (default 13.1). Returns dispute definition, required compelling-evidence exhibits, CE3.0 historical-order match rules, and 3-part rebuttal letter structure.
$0.01Base1calls / 30d - GET/v1/fba-fee-margin-calc
Deterministic Amazon FBA unit economics calculator. Pass ?price_usd=29.99&cogs_usd=6.50&weight_oz=12&referral_pct=15. Returns size tier, referral fee, estimated FBA fulfillment + storage fee, net pre-ad contribution ($ and %), breakeven ACOS %, breakeven ROAS, and target ACOS for a 15% net margin.
$0.01Base1calls / 30d - GET/v1/hs-tariff-section301-brief
US Harmonized Tariff Schedule (HTSUS) chapter overview, Section 301 China List 1-4A additional duty bands, PGA agency flags (FDA, FCC, CPSC, TSCA, Lacey Act), and 19 USC 1304 Country of Origin marking checklist. Pass ?chapter=85_electronics|39_plastics|62_apparel|94_furniture|95_toys&origin=CN. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/de-minimis-321-eligibility
US CBP Section 321 ($800 de minimis) eligibility & 2025/2026 China/Section 301 exclusion evaluator. Pass ?shipment_value_usd=180&origin=CN&subject_to_301=true. Returns Section 321 eligibility, recommended CBP Entry Type (Type 86 vs Type 11 Informal vs Type 01 Formal), anti-structuring rules, and bond/MPF checklist. Educational reference only; not legal advice.
$0.01Base1calls / 30d - GET/v1/landed-cost-estimator
Deterministic import landed cost per unit calculator. Pass ?fob_unit_usd=4.20&units=1000&freight_total_usd=850&duty_pct=7.5. Allocates FOB, ocean/air freight, customs duty, Merchandise Processing Fee (MPF), Harbor Maintenance Fee (HMF), and brokerage across the batch, returning per-unit landed cost and 2x-5x wholesale/DTC price tiers.
$0.01Base1calls / 30d - GET/v1/dimensional-weight-calc
Deterministic parcel dimensional weight vs actual billable weight calculator. Pass ?length_in=14&width_in=10&height_in=6&actual_lb=3.2&divisor=139. Compares UPS/FedEx (139 divisor) and USPS Ground Advantage (166 divisor >1 cu ft), cubic size, length+girth oversize risk, and billable weight saved by trimming carton height by 1 inch.
$0.01Base1calls / 30d - GET/v1/return-rate-benchmark
E-commerce return rate benchmark & root-cause reduction playbook. Pass ?category=apparel|footwear|consumer_electronics|home_kitchen|beauty (default apparel) & ?current_return_pct=22. Returns category P25, median, and P75 return rates, quartile standing, margin drag note, primary return drivers, and top PDP/packaging fixes.
$0.01Base1calls / 30d - GET/v1/reorder-point-safety-stock
Deterministic inventory safety stock and Reorder Point (ROP) calculator for long-lead-time supply chains. Pass ?daily_units=15&lead_time_days=35&service_level_pct=95. Computes Z-score buffer across combined demand and lead-time variance, returning safety stock units, days of cover, ROP trigger units, and 60-day PO quantity.
$0.01Base1calls / 30d - GET/v1/bundle-pricing-optimizer
Deterministic 1-pack / 2-pack / 3-pack DTC bundle pricing & shipping-amortization calculator. Pass ?anchor_price_usd=24.00&unit_cogs_usd=4.50&shipping_usd=5.00. Returns compare-at price, bundle discount price, processing fee, net contribution dollars/margin per tier, and extra CPA headroom unlocked by multi-packs.
$0.01Base1calls / 30d - GET/v1/subscription-ltv-churn-calc
Deterministic SaaS & DTC replenishment subscription LTV:CAC and payback calculator. Pass ?monthly_price_usd=29&gross_margin_pct=80&monthly_churn_pct=6.5&cac_usd=95. Returns expected subscriber tenure, gross-margin LTV, LTV:CAC ratio, CAC payback months, health verdict, and LTV dollar lift from reducing monthly churn by 1.5 points.
$0.01Base1calls / 30d - GET/v1/wholesale-moq-margin-check
Deterministic B2B wholesale keystone & distributor margin stack calculator. Pass ?msrp_usd=40&unit_cogs_usd=7.50&wholesale_discount_pct=50&moq_units=100. Returns wholesale unit price, brand gross profit/margin, MOQ order value, distributor-tier margin (at 25% distributor cut), and MAP policy readiness checklist.
$0.01Base1calls / 30d - GET/v1/b2b-agent-service-ideas
Structured blueprints for high-utility deterministic B2B agent & x402 microservices. Pass ?domain=ecommerce_ops|compliance_linting|supply_chain|ad_creative_qa (default ecommerce_ops). Returns target buyer personas, exact GET input/output JSON contracts, $0.01 CDP pricing rationale, and x402 seller design rules.
$0.01Base1calls / 30d - GET/v1/micro-saas-churn-playbook
Actionable micro-SaaS and subscription retention & dunning playbook. Pass ?churn_driver=failed_payments|onboarding_drop|low_usage|price_objection (default failed_payments). Returns root-cause analysis, benchmark recovery rates, step-by-step engineering/UX implementation checklist, and ready-to-use email/modal copy templates.
$0.01Base1calls / 30d - GET/v1/cpsc-reeses-law-battery-check
16 CFR 1263 compartment, warning and packaging check for button/coin batteries.
$0.01Base1calls / 30d - GET/v1/ca-sb54-packaging-epr-check
SB 54 producer responsibility, PRO membership and source-reduction obligations.
$0.01Base1calls / 30d - GET/v1/eu-battery-reg-2023-1542-check
Labeling, battery passport and EPR obligations by battery category.
$0.01Base1calls / 30d - GET/v1/eu-eudr-deforestation-check
EUDR due diligence statement and geolocation duties.
$0.01Base1calls / 30d - GET/v1/health-canada-cosmetic-hotlist-check
Cosmetic Notification Form and Hotlist / NHP boundary check.
$0.01Base1calls / 30d - GET/v1/canada-bilingual-cpl-label-check
Consumer Packaging and Labelling Act + Quebec Charter of French language.
$0.01Base1calls / 30d