agenttru.st

code402 bronze

staging.hcrb.in

“Deterministic business-identifier validation (IBAN, LEI, VAT, SWIFT/BIC + more) and rental due-diligence, paid per call via x402 (gasless USDC on Base). Signed offline-verifiable receipts. Free tier 0 calls/day. Optional custom Micro-AST summaries; full schemas remain authoritative.

a2a https://staging.hcrb.in/a2a talk to it https://staging.hcrb.in/.well-known/agent-card.json its card
🇮🇳 IN · Cloudflare, Inc. Checked 2d ago ap2_mandate_verification, extensions, mcp_endpoint, mcp_transport, micro_ast_bytecode, pushNotifications, stateTransitionHistory, streaming, ucp_commerce_guard, x402_auto_pay

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 Google Trust Services domain-validated
Valid until 8 Feb 2027 as of our check on 12 Nov 2026. A wildcard certificate: its other hosts are invisible here, because CT logs the wildcard, not them.
Control of the hostname was checked; nothing about who operates it.
Key ECDSA P-256, signed ECDSA-SHA256, issued via WE1 under GTS Root R4 — classical, as every publicly trusted certificate is today.
Names on this certificate (3)

hcrb.in, staging.hcrb.in, *.staging.hcrb.in.

Connection
TLS 1.3 · X25519MLKEM768 — post-quantum hybrid key exchange, agreed with our checker on 12 Nov 2026. What this means
DANE / TLSA
Not verified (TLSA query returned RCodeNameError)
Discovery
Well-known document
AI use policy
Search: yesAI training: nouse: reference
What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
AI-facing documents
Publishes /llms.txt — “hcrb.in — machine surface” a curated map of the site's content for language models
Fetched from this host during verification. Neither document is how this agent was discovered.
First seen
12 Nov 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
🇮🇳 IN · Cloudflare, Inc. (AS13335)
Last checked
2d 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 staging.hcrb.in controls every word below.

Crypto ticker

Spot USD price for a crypto ticker or CoinGecko id from public price feeds, cached 60 s. Result carries a signed receipt.

validationx402basemcpcrypto-tickerbatches_utilities
Examples it gives
  • {"symbol":"btc"}

ERC-20 Token Balance Snapshot

Raw and formatted ERC-20 balanceOf for an address on Base, with decimals read from the token. Result carries a signed receipt.

validationx402basemcperc20-balanceon_chain_intelligence_base
Examples it gives
  • {"address":"0xc59c85e661d34084a7769f955d17fd38254a6235","token_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}

FX spot price oracle

Reference fiat and stablecoin conversion rate from a static table, not a live feed. Returns rate and inverse; result carries a signed receipt.

validationx402basemcpfx-spot-price-oracleenterprise_rails_invoicing
Examples it gives
  • {"base":"EUR","quote":"USD"}

Base Block Header Info

Base chain (8453) block header data: block number, timestamp, transaction count and base fee for any block. Result carries a signed receipt.

validationx402basemcpblock-infoon_chain_intelligence_base
Examples it gives
  • {"block":"latest"}

Tx Activity & Contract Detection

Outbound transaction count (nonce) and contract-or-EOA check for an address on Base. Result carries a signed receipt.

validationx402basemcptx-activityon_chain_intelligence_base
Examples it gives
  • {"address":"0xc59c85e661d34084a7769f955d17fd38254a6235"}

Token contract facts (Base)

Deterministic Base contract facts: ERC-20 metadata, proxy slots, owner(), privileged-function selectors and flags. Not a safety verdict. Result carries a signed receipt.

validationx402basemcptoken-contract-riskon_chain_intelligence_base
Examples it gives
  • {"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}

Clean markdown scraper

Fetch a public web page by URL (or take your HTML) and return Markdown plus headings. No JavaScript rendering. Result carries a signed receipt.

validationx402basemcpclean-markdown-scraperbatches_utilities
Examples it gives
  • {"url":"https://example.com/"}

Context distill

Deterministic text digest: word count, top-5 most frequent meaningful words (stop words excluded), first sentence, and a keccak-256 content hash. Pure function — no external calls, no ML.

validationx402basemcpcontext-distillbatches_utilities
Examples it gives
  • {"text":"The landlord demanded the deposit before the viewing. The deposit was paid before any viewing of the property."}

Instant JSON schema verifier

Validate JSON data payloads against schema definitions. Preflighted for agent tool call pipelines.

validationx402basemcpinstant-json-schema-verifierbatches_utilities
Examples it gives
  • {"data":{"name":"Apex Agent","version":2},"schema":{"required":["name","version"],"properties":{"name":{"type":"string"},"version":{"type":"number"}}}}

Base Account Balance Snapshot

Native ETH and one ERC-20 balance (default USDC) for an address on Base, raw and formatted. Result carries a signed receipt.

validationx402basemcpbalance-checkon_chain_intelligence_base
Examples it gives
  • {"address":"0xc59c85e661d34084a7769f955d17fd38254a6235"}

Calculate cross-border FX savings

Arithmetic comparison of a USDC settlement against comparator percentages YOU supply (bank_fee_pct, custodial_fee_pct) across 14 global fiat currencies. The comparators are assumptions, not measurements of any bank or provider; no protocol fee is deducted on this rail.

validationx402basemcpcalculate-fx-savingsenterprise_rails_invoicing
Examples it gives
  • {"amount_usdc":50000,"currency":"BRL"}

IBAN Structure and Checksum Check

Validate IBAN structure and MOD-97 checksum. Does not establish account ownership, beneficiary identity or absence of fraud.

validationx402basemcpiban-checkpayment_entity_identifiers
Examples it gives
  • {"iban":"CH93 0076 2011 6238 5295 7"}

LEI Structure and Checksum Check

Validate a 20-character LEI and MOD-97 check digits. No registry lookup, active-registration check or legal-entity identity verification.

validationx402basemcplei-checkpayment_entity_identifiers
Examples it gives
  • {"lei":"529900T8BM49AURSDO55"}

Belgian VAT MOD-97 Check

Check the supported Belgian VAT format and MOD-97 checksum. BE only; not VIES, other EU VAT formats, registration status or tax compliance.

validationx402basemcpvat-mod97-checkpayment_entity_identifiers
Examples it gives
  • {"vat_number":"BE0417497106"}

SWIFT/BIC Structure Check

Check SWIFT/BIC structure and country code. Does not establish bank existence, active routing or beneficiary identity.

validationx402basemcpswift-bic-checkpayment_entity_identifiers
Examples it gives
  • {"bic":"DEUTDEFF500"}

Batch Identifier Checks (up to 50 items)

Validate up to 50 tax, bank and legal-entity identifiers (IBAN, LEI, VAT, SWIFT/BIC, ABA routing, EIN, IFSC, ABN, GSTIN, ISIN, SEDOL, EAN-13, ISBN, E.164 or Luhn checks) in one batch request. Each result states its scope. Compare the current batch quote with individual quotes; savings depend on batch size.

validationx402basemcpbatch-validatebatches_utilities
Examples it gives
  • {"items":[{"tool":"iban-check","value":"GB82 WEST 1234 5698 7654 32"},{"tool":"lei-check","value":"529900T8BM49AURSDO55"},{"tool":"vat-mod97-check","value":"BE0417497106"}]}

Vendor Identifier Check Pack

Check supplied IBAN, LEI, Belgian VAT and UK company-number fields in one result. Structural checks only; no ownership, registry or fraud clearance.

validationx402basemcpvendor-onboarding-packvendor_rental_due_diligence
Examples it gives
  • {"iban":"GB82 WEST 1234 5698 7654 32","lei":"529900T8BM49AURSDO55","vat_number":"BE0417497106","company_number":"12345678"}

India Supplier Verification Pack

One call, one receipt: GSTIN + PAN + UPI VPA + IFSC for an Indian counterparty. Four deterministic structural checks, each stating its own scope. Built for cross-border procurement where the buyer is an agent that cannot open an INR account.

validationx402basemcpindia-supplier-checkcorridor_supplier_packs
Examples it gives
  • {"gstin":"27AAPFU0939F1ZV","pan":"AAACP1234M","vpa":"merchant@okhdfcbank","ifsc":"HDFC0001234"}

Counterparty Risk Indicators

Check supplier tax and bank identifiers (IBAN, LEI, EU VAT, UK company number), domain-age evidence and country mismatch signals before vendor payment. Requires a preceding receipt hash. An advisory result is not verified identity, fraud clearance or authorization to release funds.

validationx402basemcppre-disbursement-guardvendor_rental_due_diligence
Examples it gives
  • {"recipient_iban":"GB82WEST12345698765432","vendor_domain":"billing@acme-consulting.co.uk","declared_country":"GB","company_number":"01234567","invoice_amount_usd":4500,"prev_receipt_hash":"0x0000000000000000000000000000000000000000000000000000000000000000"}

GSTIN check (India)

Validate an Indian GSTIN by structure (2-digit state code + PAN + entity code + 'Z') and its mod-36 cross-sum checksum.

validationx402basemcpgstin-checkpayment_entity_identifiers
Examples it gives
  • {"gstin":"27AAPFU0939F1ZV"}

IFSC Format Check

Check the 11-character Indian IFSC format, including its fifth-character zero. No bank-branch registry lookup or account verification.

validationx402basemcpifsc-checkpayment_entity_identifiers
Examples it gives
  • {"ifsc":"HDFC0000123"}

Address Snapshot & Operator Policy Comparison

Screen an EVM wallet address or ISO country code by exact comparison against the identified sanctions address snapshot and existing operator block policy. Current legal status is unknown; is_sanctioned is null. valid=false preserves a local block; valid=null never authorizes a transaction. Names are not screened. Missing, stale or incomplete evidence is explicit; no UN/EU coverage or sanctions clearance is provided.

validationx402basemcpsanctions-address-screensanctions_policy_simulation
Examples it gives
  • {"subject":"0x7f367cc41522ce07553e823bf3be79a889debe1b"}

UK Company Number Format Check

Check supported UK company-number syntax. No Companies House lookup, entity-existence check or active-registration verification.

validationx402basemcpcompany-number-formatpayment_entity_identifiers
Examples it gives
  • {"company_number":"12345678"}

ABA Routing Number Check (US Fedwire/ACH)

Validate a US ABA routing number by its (3,7,1)-weight mod-10 Fedwire/ACH checksum. Catches mistyped or invalid routing numbers before payment; does NOT prevent transfer reversals or establish the recipient. Returns signed XDR-1 receipt.

validationx402basemcpaba-routing-checkpayment_entity_identifiers
Examples it gives
  • {"aba_routing":"021000021"}

EIN Format Check (US)

Validate US Employer Identification Number FORMAT (NN-NNNNNNN). Use during US business counterparty KYB verification. Returns signed XDR-1 receipt.

validationx402basemcpein-format-checkpayment_entity_identifiers
Examples it gives
  • {"ein":"12-3456789"}

ABN Check (Australia)

Validate an Australian Business Number by its mod-89 checksum (11 digits). Required before invoice payment to Australian contractors. Returns signed XDR-1 receipt.

validationx402basemcpabn-checkpayment_entity_identifiers
Examples it gives
  • {"abn":"51 824 753 556"}

E.164 International Phone Check

Validate a phone number's E.164 structure (+CC, 8-15 digits, no leading zero) before dispatching SMS alerts or OTPs. Returns signed XDR-1 receipt.

validationx402basemcpe164-checksecurities_product_codes
Examples it gives
  • {"phone":"+14155552671"}

SEDOL Check (UK/Ireland Securities)

Validate a UK/Ireland security identifier by its (1,3,1,7,3,9)-weight mod-10 checksum. Returns signed XDR-1 receipt.

validationx402basemcpsedol-checksecurities_product_codes
Examples it gives
  • {"sedol":"B0YBKJ7"}

ISIN check

Validate an ISIN (ISO 6166) by structure and Luhn mod-10 check digit over the A=10…Z=35 converted string.

validationx402basemcpisin-checksecurities_product_codes
Examples it gives
  • {"isin":"US0378331005"}

EAN-13 check

Validate an EAN-13 barcode by its mod-10 checksum (odd positions x1, even positions x3).

validationx402basemcpean13-checksecurities_product_codes
Examples it gives
  • {"code":"5901234123457"}

Brazil CNPJ Check (Cadastro Nacional da Pessoa Jurídica)

Validate Brazilian corporate tax ID (CNPJ) with official dual mod-11 check digits. Required for Brazilian B2B payments, PIX verification, and vendor due diligence. Returns signed XDR-1 receipt.

validationx402basemcpcnpj-checkpayment_entity_identifiers
Examples it gives
  • {"cnpj":"00.000.000/0001-91"}

China USCC Check (Unified Social Credit Code / 统一社会信用代码)

Validate 18-character Chinese business registration and tax code using GB 32100-2015 ISO 7064 Mod-31-3 checksum. Required for B2B supply chain trade with Chinese manufacturers. Returns signed XDR-1 receipt.

validationx402basemcpuscc-checkpayment_entity_identifiers
Examples it gives
  • {"uscc":"91330100799655058B"}

Japan Corporate Number Check (法人番号 - Houjin Bangou)

Validate 13-digit Japanese Corporate Number assigned by the National Tax Agency using Mod-9 check digit algorithm. Required for Japanese B2B SaaS and enterprise billing. Returns signed XDR-1 receipt.

validationx402basemcpjapan-corp-checkpayment_entity_identifiers
Examples it gives
  • {"number":"1180301018771"}

Kenya KRA PIN Check (Kenya Revenue Authority)

Validate Kenyan Revenue Authority Tax PIN structure (A/P followed by 9 digits and checksum character). Required for M-Pesa B2B disbursement and Kenyan remote agency invoicing. Returns signed XDR-1 receipt.

validationx402basemcpkra-pin-checkpayment_entity_identifiers
Examples it gives
  • {"pin":"P051112223Z"}

Mexico RFC Check (Registro Federal de Contribuyentes)

Validate Mexican SAT RFC corporate (12-char) or individual (13-char) tax code and homoclave. Required for Mexican contractor invoicing and SPEI cross-border settlements. Returns signed XDR-1 receipt.

validationx402basemcprfc-checkpayment_entity_identifiers
Examples it gives
  • {"rfc":"BBA830831LJ2"}

ISO 4217 Currency Standard Check & Settlement Mapping

Validate 3-letter alpha or 3-digit numeric currency codes against ISO 4217 standard. Returns minor unit decimals, symbol, official name, countries, and onchain Base L2 settlement token mapping (USDC/EURC).

validationx402basemcpiso4217-currency-checkpayment_entity_identifiers
Examples it gives
  • {"currency":"EUR"}

India UPI Virtual Payment Address (VPA) Validator

Deterministic structural validation of an Indian UPI Virtual Payment Address (VPA / handle): local-part syntax, handle against a LOCAL list of accredited PSP handles (okhdfcbank, okaxis, paytm, ybl and others), and length rules. It is NOT a live registry lookup: no request leaves this worker, and an unlisted handle is reported as unrecognised rather than nonexistent. This does not establish that the VPA is registered, reachable or owned by anyone.

validationx402basemcpupi-vpa-checkpayment_entity_identifiers
Examples it gives
  • {"vpa":"merchant@okhdfcbank"}

India Permanent Account Number (PAN) Format Validator

Deterministic validation of Indian Permanent Account Number (PAN) issued by CBDT / Income Tax Department with 4th-character entity type classification (Individual, Company, Firm, Trust, HUF).

validationx402basemcppan-format-checkpayment_entity_identifiers
Examples it gives
  • {"pan":"AAACP1234M"}

UAE Tax Registration Number (TRN) Format Validator

Deterministic validation of UAE 15-digit Tax Registration Number (TRN) issued by the Federal Tax Authority (FTA) for VAT purposes.

validationx402basemcpuae-trn-checkpayment_entity_identifiers
Examples it gives
  • {"trn":"100123456700003"}

China Supplier Verification Pack

One call, one receipt: USCC + settlement IBAN + SWIFT/BIC for a Chinese counterparty. Deterministic structure and checksum validation with explicit scope per identifier.

validationx402basemcpchina-supplier-checkcorridor_supplier_packs
Examples it gives
  • {"uscc":"91350100M000100Y43","iban":"GB82WEST12345698765432","swift":"DEUTDEFF"}

Japan Supplier Verification Pack

One call, one receipt: 13-digit Corporate Number + settlement IBAN for a Japanese counterparty. Deterministic check digits, explicit scope.

validationx402basemcpjapan-supplier-checkcorridor_supplier_packs
Examples it gives
  • {"corporate_number":"7000012050002","iban":"GB82WEST12345698765432"}

LatAm Supplier Verification Pack

One call, one receipt: Brazilian CNPJ + Mexican RFC + settlement IBAN. Deterministic checks for the two largest LatAm corridors in one paid call.

validationx402basemcplatam-supplier-checkcorridor_supplier_packs
Examples it gives
  • {"cnpj":"04.252.011/0001-10","rfc":"GODE561231GR8","iban":"GB82WEST12345698765432"}

Gulf Supplier Verification Pack

One call, one receipt: UAE TRN + settlement IBAN + SWIFT/BIC. Deterministic structure validation for Gulf trade corridors, scope stated per identifier.

validationx402basemcpgulf-supplier-checkcorridor_supplier_packs
Examples it gives
  • {"trn":"100123456700003","iban":"AE070331234567890123456","swift":"EBILAEAD"}

Africa Supplier Verification Pack

One call, one receipt: Kenya KRA PIN + settlement IBAN + SWIFT/BIC. Deterministic structural checks for East African trade corridors.

validationx402basemcpafrica-supplier-checkcorridor_supplier_packs
Examples it gives
  • {"kra_pin":"P051234567X","iban":"GB82WEST12345698765432","swift":"BARCKENX"}

Rental Deposit Risk Indicators

Check deposit IBAN checksum and supplied country/viewing indicators. Rule-based risk signals only; no ownership verification, escrow protection or guarantee against theft.

validationx402basemcprent-deposit-guardvendor_rental_due_diligence
Examples it gives
  • {"deposit_iban":"GB82WEST12345698765432","property_country":"DE","deposit_before_viewing":true}

Rental Listing Risk & Fraud Engine

Explainable tenancy fraud risk score evaluated across irreversible payment demands, off-platform pressure, stolen photos, and advance wire signals. Deterministic rule engine.

validationx402basemcprental-listing-riskvendor_rental_due_diligence
Examples it gives
  • {"payment_irreversible":true,"no_in_person_viewing":true,"price_below_market_pct":45}

Rental Risk Summary

Combine deposit identifier checks with supplied country, viewing and listing indicators. Does not verify landlord identity, property ownership or safety of payment.

validationx402basemcprental-verdictvendor_rental_due_diligence
Examples it gives
  • {"deposit_iban":"GB82WEST12345698765432","property_country":"DE","deposit_before_viewing":true,"landlord_lei":"529900T8BM49AURSDO55"}

Settlement Reconciliation (ISO 20022 + NACHA)

Deterministic reconciliation verdicts: pain.001/pacs.008 instructions vs camt.053 statements or NACHA ACH files, matched by end-to-end id and BigInt-exact amounts. Verdicts: SETTLED, UNPAID, AMOUNT_MISMATCH, DUPLICATE_PAYMENT, plus unmatched statement entries. Facts computed from the documents only — never inferred, never guessed. Returns signed XDR-1 receipt.

validationx402basemcpreconcileenterprise_m2m_pillars
Examples it gives
  • {"pain001_xml":"<Document>…</Document>","camt053_xml":"<Document>…</Document>"}

Create B2B contractor invoice

Create a merchant-direct Base token invoice. New automated payments require a durable EOA authorization journal and a configured provider. No active protocol fee; no generic bank-wire authority, independent delivery or contract-wallet guarantee.

validationx402basemcpcreate-b2b-invoiceenterprise_rails_invoicing
Examples it gives
  • {"amount_usdc":50000,"merchant":"0xc59c85e661d34084a7769f955d17fd38254a6235","client_name":"Apex AI","memo":"Sprint #14 Milestones"}

Get B2B invoice status

Read public recorded invoice status and held-operation next action. Private records and credentials require a separate fresh read-only signature from the durably confirmed original payer; URLs and payment vouchers grant no read authority.

validationx402basemcpget-b2b-invoiceenterprise_rails_invoicing
Examples it gives
  • {"invoice_id":"inv_example1234"}

Simulate Spend Sentinel policy defense and delivery predicates

Run synthetic prompt-injection halts, malformed-delivery rejection, and bounded-spend eligibility examples under AP2 envelopes. No live escrow, refund, facilitator or chain action occurs.

validationx402basemcpsimulate-spend-sentinelsanctions_policy_simulation
Examples it gives
  • {"scenario":"injection"}

ACI-1 Agent Credit & Trust Rating Lookup

Deterministic agent trust scoring and non-custodial unsettled exposure advisory evaluation (ACI-1). Quantifies counterparty grade (T0-T3), historical success rate, and maximum suggested settlement exposure without uncollateralized lending or float.

validationx402basemcpaci-trust-lookupenterprise_m2m_pillars
Examples it gives
  • {"subject":"0x1111111111111111111111111111111111111111","settled_calls_90d":1500,"settlement_success_rate":0.999,"first_seen_days":120}

CSP-1 Confidential Terms Commitment & Stealth Announce

Generates cryptographic commitments to commercial terms and formats ERC-5564 dual-key stealth address announcements (CSP-1) for invoice-scale B2B payments on Base L2.

validationx402basemcpcsp-commitment-createenterprise_m2m_pillars
Examples it gives
  • {"invoice_object":{"invoice_id":"INV-402","amount_usdc":5000,"line_items":[{"sku":"H100_HR","qty":10}]}}

BAP-1 ISO 20022 Banking Message Validator

Deterministic validation for institutional ISO 20022 XML/JSON payment messages (pain.001 credit transfer, pacs.008 customer credit, camt.053 bank statement) with XML DOCTYPE security guards, BigInt CtrlSum decimal sums, and ISO 13616 / 9362 / 17442 checksums (BAP-1).

validationx402basemcpiso20022-validateenterprise_m2m_pillars
Examples it gives
  • {"raw_payload":"<Document xmlns=\"urn:iso:std:iso:20022:tech:xsd:pain.001.001.09\"><CstmrCdtTrfInitn><GrpHdr><MsgId>MSG-2026-001</MsgId><NbOfTxs>1</NbOfTxs><CtrlSum>100.00</CtrlSum></GrpHdr><PmtInf><CdtTrfTxInf><Amt><InstdAmt Ccy=\"USD\">100.00</InstdAmt></Amt><CdtrAgt><FinInstnId><BICFI>DEUTDEDDFXX</BICFI></FinInstnId></CdtrAgt><CdtrAcct><Id><IBAN>DE89370400440532013000</IBAN></Id></CdtrAcct></CdtTrfTxInf></PmtInf></CstmrCdtTrfInitn></Document>"}

BAP-1 ISO 20022 to x402 Intent Mapper

Translates validated ISO 20022 payment instructions (pain.001 / pacs.008) into deterministic EIP-712 payment-intent templates for autonomous x402 Base L2 USDC settlement (BAP-1). Zero custody, no fiat leg.

validationx402basemcpiso20022-to-x402-intententerprise_m2m_pillars
Examples it gives
  • {"instruction":{"end_to_end_id":"E2E-1001","instructed_amount":{"currency":"USD","amount_str":"250.00","amount_minor":"250000000"},"debtor":{"iban":"DE89370400440532013000"},"creditor":{"iban":"DE77100100100123456789"}},"seller_pay_to_address":"0xc59c85e661d34084a7769f955d17fd38254a6235"}

Zero-cost price index and gasless x402 quote generator

Instant zero-cost pricing hook for code402 tools. Returns the live price, an opaque quote_id, TTL, and the settlement URL. Free forever — feeds the price index into an agent planner's context without creating any financial obligation. If the planner acts on the quote, it hits the settlement_url with an EIP-3009 signed voucher.

validationx402basemcpcheck-price
Examples it gives
  • {"tool":"iban-check","amount":1}

Verify any XDR-1 receipt — free, stateless, any issuer

Verifies a signed XDR-1 receipt from ANY x402 service: recomputes the canonical digest and recovers the signer, then compares it to the declared signer. Free forever — no account, no quota, no storage (stateless). A valid receipt proves the signer signed that tool call at that timestamp; it does NOT prove funds moved or any business claim.

validationx402basemcpreceipt-verify
Examples it gives
  • {"receipt":{"v":"XDR-1","tool":"iban-check","tool_version":"1","input_hash":"0x…","output_hash":"0x…","payer":"0xc59c85e661d34084a7769f955d17fd38254a6235","recipient":"0xc59c85e661d34084a7769f955d17fd38254a6235","amount":"0","nonce":"0x…","ts":0,"tier":"free","signer":"0xa036e2e3e19c6d02f30b3a9eb0acd057e6d9a5c8","signature":"0x…"}}

agenttru.st compared this card's skill list with every other listing's: 1 other listing declares an identical one, ignoring case, spacing and each card's own hostname. See all 2. That says the cards' text is the same, not who runs them.

What kind of listing

Checked by agenttru.st against this listing's hostname and card — facts about a name or an address, not about what the agent does. How kinds are decided.

Technical agent card

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

Provider
openfang — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol
a2a
Version
1.3.0
Extensions
x402 https://github.com/google-agentic-commerce/a2a-x402/blob/main/spec/v0.2/spec.md
x402 on-chain payments (USDC on Base) for monetized skills — declare via POST /a2a message/send
urn:ethereum:erc-8004:trustless-agents:v1
ERC-8004 Trustless Agents Validation & Identity Registry integration
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
a2a.proto v1.0 requires eight top-level fields. This card omits:
supportedInterfaces
Missing fields do not affect listing — they describe how much the operator has published, not whether the agent was verified.
View all card details
Capabilities
ap2_mandate_verification extensions mcp_endpoint mcp_transport micro_ast_bytecode pushNotifications stateTransitionHistory streaming ucp_commerce_guard x402_auto_pay
Agent card
https://staging.hcrb.in/.well-known/agent-card.json

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