x402 merchant

api.truthbear.co

Onchain data API on Base, paid per request with x402.

Endpoints47
Price per requestfrom $0.005
Outside payers · 7dn/a
Answer 4021 of 1

Overview

as of 2026-11-09

Seller wallet: 0x2aa200640d0c77d549c0d09fcee661d4dc6d4513
Chains: Base
Hosts: api.truthbear.co
Categories: Onchain data19Other14Market data8Developer tools3Agents1Commerce1AI models1
First seen: 2026-11-08 · last seen 2026-11-09

What we observed

Payments unknownAnswers 4022026-09-21Not claimed

See the readings

Endpoints

47 registered

https://api.truthbear.co/gauge/air
Add-on, air quality for one location: US AQI category and PM2.5 reading from EPA and CAMS official feeds. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. Every record carries an offli…
BaseOther
$0.005/ request
2026-11-09
https://api.truthbear.co/gauge/calibrated
Add-on, calibrated units: normalized_index and pct_to_action so readings compare across stations. When the line has no calibration basis you get 422 with no_charge:true and reason:no-calibrated-for-this-line, and are NO…
BaseDeveloper tools
$0.005/ request
2026-11-09
https://api.truthbear.co/gauge/history
Add-on, historical placement: seasonal percentile for the current point, frequency, the percentile table, and the method and source used to compute them. Descriptive only, never a forecast or advice. No data -> 422 no_c…
BaseOther
$0.005/ request
2026-11-09
https://api.truthbear.co/gauge/lifecycle
One id in, its official lifecycle state out - no need to know which line tracks it first. Covers 19 lifecycle lines (stablecoins, AI tools and datasets, neoclouds, DePIN, RWA, carbon projects, ESG funds, tariff measures…
BaseOther
$0.005/ request
2026-11-09
https://api.truthbear.co/gauge/precip
Add-on, precipitation for one location: daily rainfall plus 30-day accumulated wet-dry drought context from ERA5. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. Every record carries …
BaseOther
$0.005/ request
2026-11-09
https://api.truthbear.co/gauge/ruler
Add-on, the official ruler: the band and threshold ladder published by the source agency, its classification, and distance-to-action. NOT every line has an official ruler - pure market quotes do not. When it does not, y…
BaseAI models
$0.005/ request
2026-11-08
https://api.truthbear.co/gauge/strata
Add-on, statistical strata: share of the last 5 years spent in each official band for this day-of-year, the percentile bands, and where the current reading falls. Backtestable, and stated as approximate. Descriptive onl…
BaseOther
$0.005/ request
2026-11-09
https://api.truthbear.co/mcp/server
[SIGNAL+PROOF] Census record for one MCP server (?name=): status, missing_streak, lifecycle, record_hash. DEGRADED DELIVERY, see unavailable_fields - prominence, maturity, github_stars, downloads and source_code_url hav…
BaseOther
$0.01/ request
2026-11-09
https://api.truthbear.co/resolve/proposer
Proposer feed for prediction-market settlement: SEC EDGAR official facts mapped to a machine-friendly answer / timestamp / evidence shape for automated proposal and dispute flows. Three separated times, explicit resolut…
BaseMarket data
$0.01/ request
2026-11-09
https://api.truthbear.co/stable/coin
[SIGNAL+PROOF] Census record for one stablecoin (?symbol=): market cap, price, depeg state, lifecycle and time series, each with record_hash. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not b…
BaseMarket data
$0.01/ request
2026-11-09
https://api.truthbear.co/trust/precheck
[SIGNAL+PROOF] Demand record for one x402 service (?service=): demand_class (REAL/SOLO/PROBE/WASH), calls_30d, unique_payers_30d, score_total, liveness_state, lifecycle, record_hash. Model demand-v1, refreshed daily fro…
BaseMarket data
$0.01/ request
2026-11-09
https://api.truthbear.co/pay/tier2
Tiered payment receipt (tier 2): pay once with x402 and get back a short-lived receipt token that /pay/verify checks for you. The tier is fixed by the path - you do not send it. Optional ?ref= carries your own opaque re…
BaseOther
$0.03/ request
2026-11-08
https://api.truthbear.co/gauge/census
[BATCH+PROOF] All entities for one signal at their latest reading, with band, frequency_label and percentile columns so you can rank across stations and screen for the unusual in one call. Cross-station comparison is th…
BaseOther
$0.09/ request
2026-11-09
https://api.truthbear.co/gauge/history-series
[TIME SERIES EXPORT] Full retained series for one signal and entity (?days=, ?format=json or csv): every snapshot up to days (default 400, cap 1000) with snapshot_date, observed_at, data_age_hours, current, band and rec…
BaseDeveloper tools
$0.09/ request
2026-11-08
https://api.truthbear.co/gauge/macro-reconcile-full
[RECONCILIATION] Market-implied against officially-realized, side by side: Kalshi implied levels versus BLS official prints, aligned indicator by indicator, with the divergence quantified. The alignment key is returned …
BaseMarket data
$0.09/ request
2026-11-09
https://api.truthbear.co/mcp/census
[BATCH+PROOF] Full MCP ecosystem census (21,236 servers, latest day): status, lifecycle, missing_streak, record_hash. DEGRADED DELIVERY, see unavailable_fields - prominence, maturity, github_stars and downloads have no …
BaseOther
$0.09/ request
2026-11-09
https://api.truthbear.co/mcp/graveyard
[BATCH+PROOF] MCP server graveyard - servers that vanished from the census. THRESHOLD stated plainly: listed on FIRST confirmed absence (confirm_absences=1), not multi-day confirmation; only two snapshot days exist. rec…
BaseAgents
$0.09/ request
2026-11-09
https://api.truthbear.co/resolve
Settlement evidence v0 for prediction-market and dispute workflows: did an issuer file a given SEC EDGAR form before your cutoff? Returns THREE SEPARATED TIMES (event / disclosure / cutoff), a resolution_status of resol…
BaseMarket data
$0.09/ request
2026-11-08
https://api.truthbear.co/stable/census
[BATCH+PROOF] Full stablecoin census, latest day, ranked by market cap; lifecycle flags terminated and depegged. Add ?verifiable=1 and every row carries _hash_core so you can recompute the hash offline without trusting …
BaseOther
$0.09/ request
2026-11-07
https://api.truthbear.co/stable/graveyard
[BATCH+PROOF] Stablecoin death register - terminated below 0.10 or persistently absent. Add ?verifiable=1 for per-row _hash_core, fully offline-recomputable. A neutral observation record: not a rating, not an endorsemen…
BaseOnchain data
$0.09/ request
2026-11-07
https://api.truthbear.co/stablecoin-deaths
[BATCH+PROOF] Stablecoin death samples - a neutral record: the full pre-mortem snapshot of terminated stablecoins (price, supply, collateral, redemption) plus lifecycle context (termination type, confirmed death date, d…
BaseOnchain data
$0.09/ request
2026-11-07
https://api.truthbear.co/trust/graveyard
[BATCH+PROOF] x402 service graveyard - services that vanished from the census. THRESHOLD stated plainly: listed on FIRST confirmed absence (confirm_absences=1), NOT multi-day confirmation - only two snapshot days exist,…
BaseOther
$0.09/ request
2026-11-07
https://api.truthbear.co/trust/scorecard
[BATCH+PROOF] Full x402 service demand roster, latest day: demand_class, calls_30d, unique_payers_30d, score_total, liveness_state, lifecycle, record_hash per service. Model demand-v1, refreshed daily from the public CD…
BaseMarket data
$0.09/ request
2026-11-07
https://api.truthbear.co/gauge/agri-region
[3-LEG] Agriculture chain, one grain belt (?loc=us-iowa): leading soil drought (USDM D0-D4) -> current heat stress and growing degree days -> realized crop vigour VHI - did the drought actually reach the crop (confirmat…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/biodiversity-region
[3-LEG] Biodiversity credit chain, one project (?entity=uk-bng-warwickshire): leading standard-body pressure - registry, methodology or rating change -> current current registry state -> realized lifecycle outcome (conf…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/border-wait-region
[3-LEG] Land border chain, one crossing (?entity=laredo-world-trade): leading upstream pressure - lead traffic, staffing and inspection intensity -> current current CBP border wait times by lane -> realized commercial f…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/carbon-region
[3-LEG] Carbon integrity chain, one carbon project (?entity=kariba-redd): leading rating drift, downgrades and standard-body review -> current registry lifecycle from listed to suspended or de-listed -> realized price i…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/chokepoint-region
[4-LEG] Maritime chokepoint passage chain, one chokepoint (?loc=hormuz, suez, panama, malacca and more): leading sea state against operating thresholds -> current anchorage congestion, vessels waiting -> realized daily …
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/dependency-region
[3-LEG] AI dependency chain, one dependency (?entity=openai-text-davinci-003): leading deprecation notices INCLUDING the sunset date the publisher itself scheduled -> current current availability -> realized lifecycle t…
BaseDeveloper tools
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/drought-region
[3-LEG] Drought chain, one drought region (?entity=us-california): leading precipitation deficit, soil moisture and snowpack -> current the OFFICIAL US Drought Monitor class and area coverage -> realized streamflow and …
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/drug-shortage-region
[3-LEG] Drug shortage chain, one therapeutic class (?entity=oncology): leading new-shortage incidence from openFDA new listings, which leads the burden peak -> current current active shortages in the class -> realized r…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/earthquake-region
[3-LEG] Seismic activity chain, one seismic zone (?entity=california-san-andreas): leading swarm rate, USGS micro-event rate rising - DESCRIPTIVE and explicitly not a prediction -> current current max magnitude and coun…
BaseOther
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/filing-company
[3-LEG] Regulatory filing chain, one issuer (?entity=AMC): leading NT late-filing notices, a distress leading indicator -> current 8-K material events graded by item severity -> realized Form 4 insider transactions (con…
BaseMarket data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/grid-region
[3-LEG] Power-grid chain, one grid region (?loc=us-ercot): leading demand pressure from heating and cooling degree days -> current renewable availability, solar and wind -> realized energy inflation (CPI energy year-ove…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/grid-reliability-region
[3-LEG] Grid reliability chain, one balancing authority (?entity=us-ercot): leading EIA-930 day-ahead demand forecast approaching recent peak, about one day of lead -> current current demand against capacity tightness -…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/hurricane-region
[3-LEG] Hurricane chain, one basin (?entity=atlantic|epacific|cpacific): leading NHC official 2/7-day genesis probability (NHC-quoted, not our forecast) -> current active storms - category, wind, pressure, position -> r…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/japan-region
Japan official readings in one call plus an independent cross-agency check: JMA seismic intensity (shindo), RSMC Tokyo typhoon analysis, Ministry of Finance JGB yields across seven tenors, and the Japan rows of BIS and …
BaseOther
$0.25/ request
2026-11-07
https://api.truthbear.co/gauge/policy-region
[3-LEG] Climate policy chain, one policy (?entity=kyoto-protocol): leading repeal proposals and judicial challenge -> current lifecycle from enacted to repealed, days alive -> realized dependency cascade when a policy d…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/promise-region
[3-LEG] Promise-reconciliation chain, one promisor (?entity=humane-ai-pin): leading promise slippage - schedule slipping, spec shrinking, promise page vanishing -> current current company or project status -> realized l…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/region
[3-LEG] Local three-leg environment chain, one location (?loc=): leading air quality (AQI) -> current precipitation, rain and 30-day dry-wet -> realized nearest river stage and streamflow (confirmation gate). A chain, n…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/severe-convection-region
[3-LEG] Severe convection and hail chain, one convective region (?entity=tornado-alley-core): leading SPC Day-1 outlook with CAPE, CIN and shear - hours of lead -> current current storm reports -> realized hail and wind…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/shipping-region
[3-LEG] Shipping chokepoint chain, one chokepoint or port (?loc=malacca): leading sea state and wind against operating thresholds -> current wave decomposition, local storm against distant swell -> realized AIS transit …
BaseCommerce
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/stablecoin-region
[3-LEG] Stablecoin chain, one stablecoin (?entity=terrausd-ust): leading depeg pressure - peg deviation, reserves, regulatory notices -> current current peg and market cap -> realized redemption and lifecycle outcome (c…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/taiwan-region
Taiwan first-party official readings in one call: PLA air and naval activity around Taiwan (Ministry of National Defense), central bank reference FX rates (CBC), TAIEX and sector indices (TWSE), significant earthquakes …
BaseMarket data
$0.25/ request
2026-11-07
https://api.truthbear.co/gauge/tariff-region
[3-LEG] Tariff and customs measure chain, one trade measure (?entity=sec301-china-list1): leading review pipeline stage -> current current legal force -> realized lifecycle from imposed to expired or rescinded (confirma…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/tool-region
[3-LEG] AI tool and MCP chain, one tool (?entity=mammoth-ai): leading decay warnings, release cadence stalling and docs going dark -> current live or dead status from real DNS and GitHub checks -> realized lifecycle fro…
BaseOnchain data
$0.25/ request
2026-11-09
https://api.truthbear.co/gauge/wildfire-region
[3-LEG] Wildfire chain, one fire-risk region (?entity=us-california): leading fire weather - hot, dry and windy -> current active fire detections from NASA FIRMS satellite thermal anomalies -> realized downwind smoke im…
BaseOther
$0.25/ request
2026-11-09

Evidence

as of 2026-11-09

Answers HTTP 402

1 of 1

1 of 1 probed endpoints answered HTTP 402 with a parseable payment payload

checked 2026-09-21

x402-style payments, 7-day window (Base)

unknown

unknown. the 7-day payments read on Base did not complete (time budget spent at block 54272044 (361000 of 3024001 blocks read))

window ended 2026-11-08

By chain

Chain	Seller wallet	Endpoints	Answers 402	x402-style payments
Base	0x2aa200640d0c77d549c0d09fcee661d4dc6d4513	47	1 of 1 probed endpoints answered HTTP 402 with a parseable payment payload 2026-09-21	unknown. the 7-day payments read on Base did not complete (time budget spent at block 54272044 (361000 of 3024001 blocks read))

One seller wallet, each chain read on its own. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.

Pricing

Lowest

$0.005

per request, as registeredas of 2026-11-09

Median

$0.25

per request, as registeredas of 2026-11-09

Highest

$0.25

per request, as registeredas of 2026-11-09

The price each endpoint registered in the x402 catalogue. A listed price is a registration, not an observed charge.

Claim this merchant

Sign a message from the payout address 0x2aa200…6d4513 to claim this page or download its payment ledger. Claiming proves control of the payout key. It says nothing about the service behind the address, and it does not change how this merchant is ranked. No email, no account: the signature is the whole credential, and signing a message costs no gas and moves nothing.

Data CC-BY-4.0, attribution: data by satohub.ai. Data: x402-list.com (CC BY 4.0). Data as of 2026-11-09. Appearing here is not an endorsement. Check an endpoint with the doctor.