Truth Bear — Cross-Line Cascade & Leading Signals for AI Agents (GAUGE engine) bronze

api.truthbear.co

“Pay-per-call signals for AI agents via x402 (USDC on Base, no API key). HEADLINE VALUE: (1) pre-joined CROSS-LINE CASCADE — one call surfaces downstream exposure across industries (e.g. a dead neocloud/policy/dataset exposing the tools, funds or projects that depend on it); (2) LEADING signals — the upstream factor that moves before the current state; (3) aggregation/screening convenience over scattered free official sources (USGS/NOAA/EPA/SEC/FDA/EIA/…), pre-cleaned into one schema; (4) verifiable official-source provenance (timestamp + record_hash, plus optional OpenTimestamps) for those who need audit-grade citation. Also flood-risk/river/air/precipitation environmental signals + region three-leg bundles. Pure description, no judgment/prediction. Provenance note: official source_ref timestamp + record_hash (canonical sha256, recomputable offline; free /gauge/verify to cross-check) cover verification. Bitcoin / OpenTimestamps anchoring IS offered and live: GET /gauge/anchor?hash=<record_hash> returns

https://api.truthbear.co/.well-known/agent-card.json its card

🇸🇬 SG · Tencent Building, Kejizhongyi Avenue Checked 6d ago extendedAgentCard, extensions, pushNotifications, streaming

we checked this the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Let's Encrypt domain-validated
Valid until 17 Nov 2026.

Control of the hostname was checked; nothing about who operates it.
DANE / TLSA: Not verified (TLSA query returned RCodeNameError)
Discovery: Well-known document
First seen: 25 Aug 2026

View verification details

Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: 🇸🇬 SG · Tencent Building, Kejizhongyi Avenue (AS132203)
Last checked: 6d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of api.truthbear.co controls every word below.

One official signal record for any signal_id and entity

One official signal record for any signal_id and entity | GET /gauge | price $0.01 via x402

gaugeno-data-no-chargeofficial-sourcedescriptive-only

Examples it gives

{"signal_id":"genus.species (ASCII binomial). /gauge serves the WHOLE signal universe, not only hydrology - e.g. crypto.spot | macro.unemployment | shipping.route-disruption | earthquake.current_activ

Raw hydrology reading (free)

Raw hydrology reading (free) | GET /gauge/raw | price free via x402

gaugeraw

Examples it gives

{"signal_id":"hydrology.*","entity":"USGS site id"}

Coverage + freshness manifest (free)

Coverage + freshness manifest (free) | GET /gauge/coverage | price free via x402

gaugecoverage

Examples it gives

{"industry":"optional filter","signal_id":"optional filter","entity":"optional filter","summary":"optional 1 for compact per-signal counts"}

Local three-leg environment chain

Local three-leg environment chain | GET /gauge/region | price $0.25 via x402

gaugeregionepacamsera5usgscross-sourceleading-indicator

Examples it gives

{"loc":"us-stlouis | us-memphis | us-chicago | …"}

All entities for one signal at their latest reading

All entities for one signal at their latest reading | GET /gauge/census | price $0.09 via x402

gaugecensusno-data-no-chargedescriptive-only

Examples it gives

{"signal_id":"…"}

Full retained series for one signal and entity

Full retained series for one signal and entity | GET /gauge/history-series | price $0.09 via x402

gaugehistoryseriesno-data-no-chargerecord-hashdescriptive-only

Examples it gives

{"signal_id":"e.g. hydrology.river-level | stablecoin.lifecycle","entity":"object id (see /gauge/coverage)","days":"optional lookback, default 400, cap 1000","format":"json (default) | csv"}

Batch watchlist read (subscription-gated, no per-call pay)

Batch watchlist read (subscription-gated, no per-call pay) | GET /gauge/watch | price free (subscription token required) via x402

gaugewatch

Examples it gives

{"items":"comma-separated industry:entity pairs, e.g. drug-detail:carboplatin,border-wait:laredo-world-trade,drug-shortage:oncology (cap 30)","token":"optional ?token= (or Authorization: Bearer <token

Watchlist delta / poll (subscription-gated, webhook-lite)

Watchlist delta / poll (subscription-gated, webhook-lite) | GET /gauge/watch-changes | price free (subscription token required) via x402

gaugewatchchanges

Examples it gives

{"items":"comma-separated industry:entity pairs (cap 30)","since":"ISO timestamp or unix seconds; default 24h ago","token":"optional ?token= (or Authorization: Bearer <token>)"}

Agriculture chain, one grain belt

Agriculture chain, one grain belt | GET /gauge/agri-region | price $0.25 via x402

gaugeagriregionusdmndmcnasa-powernoaa-starcross-source

Examples it gives

{"loc":"us-iowa | ar-pampas | br-matogrosso | ua-ukraine | ru-southrussia | cn-northchina | au-nsw | in-punjab | …"}

Power-grid chain, one grid region

Power-grid chain, one grid region | GET /gauge/grid-region | price $0.25 via x402

gaugegridregioneiablsopen-meteocross-sourceleading-indicator

Examples it gives

{"loc":"us-ercot | us-caiso | us-pjm | us-miso | us-nyiso | eu-germany | eu-france | eu-uk | eu-spain | jp-japan | au-nem | in-india"}

Regulatory filing chain, one issuer

Regulatory filing chain, one issuer | GET /gauge/filing-company | price $0.25 via x402

gaugefilingcompanysec-edgarcross-sourceleading-indicatorcausal-chainno-data-no-charge

Examples it gives

{"entity":"AAPL | AMC | CVNA | GME | BA | F | TSLA | … (ticker)"}

Wildfire chain, one fire-risk region

Wildfire chain, one fire-risk region | GET /gauge/wildfire-region | price $0.25 via x402

gaugewildfireregionnasa-firmsnwsepacross-sourceleading-indicator

Examples it gives

{"region":"us-california | us-pacific-northwest | canada-bc | au-nsw | med-greece | amazon-brazil | siberia-russia | … (fire region id)"}

Aviation ground-stop chain

Aviation ground-stop chain | GET /gauge/nas-region | price $0.25 via x402

gaugenasregionfaa-nas-statusnws-metarcross-sourceleading-indicatorcausal-chain

Examples it gives

{"entity":"ewr | lga | jfk | sfo | ord | bos | phl | atl | dfw | den | clt | iah | mia | sea | lax | dca | mco | las | phx | mem | sdf | anc | … (US hub airport IATA id)"}

Land border chain, one crossing

Land border chain, one crossing | GET /gauge/border-wait-region | price $0.25 via x402

gaugeborderwaitregionus-cbpcross-sourceleading-indicatorcausal-chain

Examples it gives

{"entity":"laredo-world-trade | laredo-colombia | laredo-bridge1 | otay-mesa-commercial | san-ysidro | el-paso-ysleta | el-paso-bota | pharr | hidalgo | nogales-mariposa | calexico-east | brownsville-

Seismic activity chain, one seismic zone

Seismic activity chain, one seismic zone | GET /gauge/earthquake-region | price $0.25 via x402

gaugeearthquakeregionusgscross-sourceleading-indicatorcausal-chainno-data-no-charge

Examples it gives

{"entity":"california-san-andreas | cascadia-pnw | alaska-aleutians | japan | sumatra-indonesia | philippines | chile | mexico | central-america | turkey-anatolia | greece-italy-med | iran | nepal-him

Drug shortage chain, one therapeutic class

Drug shortage chain, one therapeutic class | GET /gauge/drug-shortage-region | price $0.25 via x402

gaugedrugshortageregionopenfdacross-sourceleading-indicatorcausal-chain

Examples it gives

{"entity":"anesthesia | oncology | psychiatry-cns | analgesia-opioid | anti-infective | cardiovascular | neurology | gastroenterology | endocrine | hematology | pulmonary-allergy | ophthalmology | tpn

Per-drug shortage chain, one drug

Per-drug shortage chain, one drug | GET /gauge/drug-detail-region | price $0.25 via x402

gaugedrugdetailregionopenfdacross-sourceleading-indicatorcausal-chain

Examples it gives

{"entity":"carboplatin | cisplatin | oxaliplatin | methotrexate | fluorouracil | epinephrine | norepinephrine | phenylephrine | atropine | amoxicillin | piperacillin-tazobactam | cefazolin | vancomyci

Severe convection and hail chain

Severe convection and hail chain | GET /gauge/severe-convection-region | price $0.25 via x402

gaugesevereconvectionregionnoaa-spccross-sourceleading-indicatorcausal-chain

Examples it gives

{"entity":"tornado-alley-core | tx-panhandle-hail | central-kansas | high-plains-hail-alley | front-range-co | northern-plains | upper-midwest-derecho | corn-belt-il | ohio-valley | tennessee-valley |

Grid reliability chain, one balancing authority

Grid reliability chain, one balancing authority | GET /gauge/grid-reliability-region | price $0.25 via x402

gaugegridreliabilityregionus-eia-930cross-sourceleading-indicatorcausal-chain

Examples it gives

{"entity":"caiso | ercot | miso | pjm | spp | nyiso | isone | bpa | pace | pacw | fpl | soco | tva | duke | psco | azps | aeci | pnm | … (EIA-930 Balancing Authority id)"}

Hurricane chain, one basin

Hurricane chain, one basin | GET /gauge/hurricane-region | price $0.25 via x402

gaugehurricaneregionnoaa-nhccross-sourceleading-indicatorcausal-chainno-data-no-charge

Examples it gives

{"entity":"atlantic | epacific | cpacific (NHC basin)"}

Drought chain, one drought region

Drought chain, one drought region | GET /gauge/drought-region | price $0.25 via x402

gaugedroughtregionusdmndmcusgscross-sourceleading-indicator

Examples it gives

{"entity":"us-california | us-southwest | us-southernplains | us-northernplains | us-cornbelt | us-southeast | us-pacificnw | us-lowermississippi | us-northeast | us-rockies (US climate region)"}

Stablecoin death samples, a neutral record

Stablecoin death samples, a neutral record | GET /stablecoin-deaths | price $0.09 via x402

stablecoindeathsno-data-no-chargerecord-hashoffline-recomputabledescriptive-only

Demand record for one x402 service

Demand record for one x402 service | GET /trust/precheck | price $0.01 via x402

trustprecheckno-data-no-chargedegraded-deliveryrecord-hashdescriptive-only

Examples it gives

{"service":"api-exa-ai"}

Full x402 service demand roster

Full x402 service demand roster | GET /trust/scorecard | price $0.09 via x402

trustscorecardno-data-no-chargedegraded-deliveryrecord-hashdescriptive-only

x402 service graveyard, services that vanished from the census

x402 service graveyard, services that vanished from the census | GET /trust/graveyard | price $0.09 via x402

trustgraveyardno-data-no-chargerecord-hashoffline-recomputabledescriptive-only

Census record for one stablecoin

Census record for one stablecoin | GET /stable/coin | price $0.01 via x402

stablecoinno-data-no-chargerecord-hashdescriptive-only

Examples it gives

{"symbol":"basis-cash-bac"}

Full stablecoin census, latest day

Full stablecoin census, latest day | GET /stable/census | price $0.09 via x402

stablecensusno-data-no-chargeoffline-recomputabledescriptive-only

Stablecoin death register, terminated below 0.10 or persistently absent

Stablecoin death register, terminated below 0.10 or persistently absent | GET /stable/graveyard | price $0.09 via x402

stablegraveyardno-data-no-chargeoffline-recomputabledescriptive-only

Settlement evidence v0 for prediction-market and dispute workflows

Settlement evidence v0 for prediction-market and dispute workflows | GET /resolve | price $0.09 via x402

resolveno-data-no-chargedescriptive-only

Examples it gives

{"entity":"AAPL","form":"10-K","cutoff":"2025-01-01"}

Proposer feed for prediction-market settlement

Proposer feed for prediction-market settlement | GET /resolve/proposer | price $0.01 via x402

resolveproposerno-data-no-chargeofficial-sourcedescriptive-only

Examples it gives

{"entity":"AAPL","form":"10-K","cutoff":"2025-01-01"}

Add-on, the official ruler

Add-on, the official ruler | GET /gauge/ruler | price $0.005 via x402

gaugerulerno-data-no-chargeofficial-sourcerecord-hashoffline-recomputable

Examples it gives

{"signal_id":"hydrology.river-level","entity":"07010000"}

Add-on, calibrated units, normalized_index and pct_to_action so readings compare…

Add-on, calibrated units, normalized_index and pct_to_action so readings compare across | GET /gauge/calibrated | price $0.005 via x402

gaugecalibratedno-data-no-chargerecord-hashoffline-recomputable

Examples it gives

{"signal_id":"hydrology.river-level","entity":"07010000"}

Add-on, statistical strata

Add-on, statistical strata | GET /gauge/strata | price $0.005 via x402

gaugestratano-data-no-chargeofficial-sourcedescriptive-only

Examples it gives

{"signal_id":"hydrology.river-level","entity":"07010000"}

Add-on, historical placement

Add-on, historical placement | GET /gauge/history | price $0.005 via x402

gaugehistoryno-data-no-chargedescriptive-only

Examples it gives

{"signal_id":"hydrology.river-level","entity":"07010000"}

Add-on, air quality for one location

Add-on, air quality for one location | GET /gauge/air | price $0.005 via x402

gaugeairno-data-no-chargeofficial-sourcerecord-hashoffline-recomputabledescriptive-only

Examples it gives

{"loc":"us-stlouis"}

Add-on, precipitation for one location

Add-on, precipitation for one location | GET /gauge/precip | price $0.005 via x402

gaugeprecipno-data-no-chargerecord-hashoffline-recomputabledescriptive-only

Examples it gives

{"loc":"us-stlouis"}

Taiwan first-party official readings in one call

Taiwan first-party official readings in one call | GET /gauge/taiwan-region | price $0.25 via x402

gaugetaiwanregionno-data-no-chargeofficial-sourcedescriptive-only

Japan official readings in one call plus an independent cross-agency check

Japan official readings in one call plus an independent cross-agency check | GET /gauge/japan-region | price $0.25 via x402

gaugejapanregionno-data-no-chargeofficial-sourcedescriptive-only

Market-implied against officially-realized

Market-implied against officially-realized | GET /gauge/macro-reconcile-full | price $0.09 via x402

gaugemacroreconcilefullno-data-no-chargeofficial-sourcedescriptive-only

Tiered payment receipt (tier 2)

Tiered payment receipt (tier 2) | GET /pay/tier2 | price $0.03 via x402

paytier2

Tiered payment receipt (tier 3)

Tiered payment receipt (tier 3) | GET /pay/tier3 | price $0.10 via x402

paytier3

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: Truth Bear — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 2.0
Extensions: https://aeml-x402.zeabur.app/ext/x402-only/v1 — required of clients
This agent does NOT implement A2A message transport (no message/send). Skills are plain HTTP GET endpoints paid per call with x402 (USDC on Base or Solana, no API key, no account). Discover and call them at the url in supportedInterfaces. An A2A client tha

A2A protocol extensions the card declares. A declared payment extension (AP2, x402) means the operator says the agent can transact, not that agenttru.st has seen it do so.
Card completeness: complete all eight fields required by a2a.proto v1.0

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Capabilities: extendedAgentCard extensions pushNotifications streaming
Agent card: https://api.truthbear.co/.well-known/agent-card.json

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