hcrb.in
No description published for this endpoint.
OtherLiveeip155:8453Exactvia facilitator:thirdweb
Calls · 30d
6
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 14 snapshots so far.
$10.15
Verified settled volume
1,289 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xc59c85e661d34084a7769f955d17fd38254a6235The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"mcp": "https://hcrb.in/mcp",
"call": "/v1/tools/calculate-fx-savings/call",
"code": "X402_PAYMENT_REQUIRED",
"docs": "https://hcrb.in/openapi.json",
"tool": "calculate-fx-savings",
"title": "Calculate cross-border FX savings",
"amount": "5000",
"method": "POST",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"tier": "economy",
"version": "2",
"currency": "USDC",
"multiplier": 1,
"asset_caip19": "eip155:8453/erc20:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo_caip10": "eip155:8453:0xc59c85e661d34084a7769f955d17fd38254a6235"
},
"payTo": "0xc59c85e661d34084a7769f955d17fd38254a6235",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://hcrb.in/v1/tools/calculate-fx-savings/call",
"description": "code402 calculate-fx-savings (standard floor — 1.0x reserve floor)",
"maxTimeoutSeconds": 300
},
{
"asset": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
"extra": {
"name": "EURC",
"tier": "economy",
"version": "2",
"currency": "EURC",
"multiplier": 1,
"asset_caip19": "eip155:8453/erc20:0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
"payTo_caip10": "eip155:8453:0xc59c85e661d34084a7769f955d17fd38254a6235"
},
"payTo": "0xc59c85e661d34084a7769f955d17fd38254a6235",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://hcrb.in/v1/tools/calculate-fx-savings/call",
"description": "code402 calculate-fx-savings (EURC — standard floor)",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://hcrb.in/v1/tools/calculate-fx-savings/call",
"mimeType": "application/json",
"description": "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."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"input": {
"currency": "BRL",
"amount_usdc": 50000
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"tool": "calculate-fx-savings",
"scope": "estimate only",
"currency": "USD",
"amount_usdc": 1000,
"pct_retained": 0.9,
"legacy_swift_fee_usd": 25,
"retained_savings_usd": 22.5,
"code402_protocol_fee_usd": 2.5
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"properties": {
"amount": {
"type": "number",
"description": "Gross invoice settlement volume in USD/USDC (alias)."
},
"currency": {
"type": "string",
"description": "Target currency for local comparison (e.g. EUR, GBP, BRL, INR, ARS, PHP, NGN, SGD)."
},
"amount_usd": {
"type": "number",
"description": "Gross invoice settlement volume in USD/USDC (alias)."
},
"amount_usdc": {
"type": "number",
"description": "Gross invoice settlement volume in USD/USDC."
}
}
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"amount_usdc",
"retained_savings_usd",
"pct_retained"
],
"properties": {
"tool": {
"type": "string"
},
"scope": {
"type": "string"
},
"currency": {
"type": "string"
},
"amount_usdc": {
"type": "number"
},
"deel_fee_usd": {
"type": "number"
},
"pct_retained": {
"type": "number"
},
"local_currency": {
"type": "object"
},
"legacy_swift_fee_usd": {
"type": "number"
},
"retained_savings_usd": {
"type": "number"
},
"code402_protocol_fee_usd": {
"type": "number"
}
}
}
}
}
}
}
}
},
"how_to_pay": {
"steps": [
"1. Decode the PAYMENT-REQUIRED response header (Base64 JSON, x402Version: 2).",
"2. Sign an EIP-3009 transferWithAuthorization for accepts[0] (payTo 0xc59c85e661d34084a7769f955d17fd38254a6235).",
"3. Retry the identical request with header PAYMENT-SIGNATURE: <base64-payload>."
],
"protocol": "x402 v2 (eip155:8453 Base USDC)",
"amount_minor": "5000",
"discovery_manifest": "https://hcrb.in/.well-known/x402.json",
"mcp_streamable_http": "https://hcrb.in/mcp",
"fast_pass_bulk_option": {
"tiers": {
"pass": "1000000 minor ($1.00 USDC) -> 240 fast-path Bearer ck_live_ calls (<15ms)",
"burst": "100000 minor ($0.10 USDC) -> 25 fast-path Bearer ck_live_ calls (<15ms)",
"micro": "10000 minor ($0.01 USDC) -> 3 fast-path Bearer ck_live_ calls (<15ms)",
"treasury": "5000000 minor ($5.00 USDC) -> 1300 fast-path Bearer ck_live_ calls (<15ms)"
},
"endpoint": "POST https://hcrb.in/v1/quota/mint-x402",
"mcp_tool": "hcrb_mint_quota_x402"
},
"recommended_autosign_wedge": {
"endpoint": "POST https://hcrb.in/fx/best-execution-quote",
"mcp_tool": "hcrb_fx_best_execution_quote",
"description": "Sub-$0.01 auto-sign FX reference receipt (10,000 minor / $0.01 USDC with tier: 'micro', or 20,000 minor standard multi-venue comparison).",
"entry_price_minor": "10000",
"minimal_post_body": {
"tier": "micro",
"chain_id": 8453,
"buy_token": "EURC",
"sell_token": "USDC",
"sell_amount_human": 100
}
}
},
"price_note": "The published floor is not a fixed quote for every tool. Gas guards may raise the price; use this response's accepts amount before authorizing payment. Each accepted voucher settles as its own transfer.",
"description": "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.",
"x402Version": 2,
"input_schema": {
"type": "object",
"properties": {
"amount": {
"type": "number",
"description": "Gross invoice settlement volume in USD/USDC (alias)."
},
"currency": {
"type": "string",
"description": "Target currency for local comparison (e.g. EUR, GBP, BRL, INR, ARS, PHP, NGN, SGD)."
},
"amount_usd": {
"type": "number",
"description": "Gross invoice settlement volume in USD/USDC (alias)."
},
"amount_usdc": {
"type": "number",
"description": "Gross invoice settlement volume in USD/USDC."
}
}
},
"output_schema": {
"type": "object",
"required": [
"amount_usdc",
"retained_savings_usd",
"pct_retained"
],
"properties": {
"tool": {
"type": "string"
},
"scope": {
"type": "string"
},
"currency": {
"type": "string"
},
"amount_usdc": {
"type": "number"
},
"deel_fee_usd": {
"type": "number"
},
"pct_retained": {
"type": "number"
},
"local_currency": {
"type": "object"
},
"legacy_swift_fee_usd": {
"type": "number"
},
"retained_savings_usd": {
"type": "number"
},
"code402_protocol_fee_usd": {
"type": "number"
}
}
},
"operator_offer": {
"tier": "audit-gate-pilot",
"pilot": "https://hcrb.in/pilot",
"verify": "https://hcrb.in/verify",
"contact_discovery": "https://hcrb.in/.well-known/operator-contact",
"request_pilot_api": "https://hcrb.in/v1/pilot/request"
},
"example_request": {
"input": {
"currency": "BRL",
"amount_usdc": 50000
}
},
"price_usdc_floor": 0.005,
"challenge_variant": "h1_inband_schema_guide",
"retry_schema_hint": {
"module": "fx_best_execution",
"minimal_valid_post_body": {
"chain_id": 8453,
"buy_token": "EURC",
"sell_token": "USDC",
"sell_amount_human": 100
},
"guaranteed_response_fields": [
"ecb_mid_rate",
"edcc_lock",
"onchain_solver_route",
"receipt_id"
],
"empty_body_defaults_supported": true
},
"executable_solver_quote": {
"ok": true,
"tier": "FREE_WEDGE_INDICATIVE_QUOTE",
"module": "fx_best_execution",
"chain_id": 8453,
"buy_token": "EURC",
"sell_token": "USDC",
"rate_source": "static_reference_constant",
"execution_note": "Indicative reference conversion only. No transaction, route, fee or rate lock is provided or implied; this service never takes custody of or redirects swap output.",
"indicative_only": true,
"next_paid_action": {
"note": "Submit tier: 'micro' (10,000 minor / $0.01 USDC) for an attested XDR-1 FX reference receipt within the autonomous agent auto-sign ceiling.",
"endpoint": "POST https://hcrb.in/fx/best-execution-quote",
"mcp_tool": "hcrb_fx_best_execution_quote",
"minimal_post_body": {
"tier": "micro",
"chain_id": 8453,
"buy_token": "EURC",
"sell_token": "USDC",
"sell_amount_human": 100
},
"micro_tier_price_minor": "10000",
"standard_tier_price_minor": "20000"
},
"upgrade_via_x402": {
"note": "Paid POST /fx/best-execution-quote compares live venues and returns a signed XDR-1 receipt. No rate is locked or guaranteed.",
"edcc_lock_included": false,
"xdr1_receipt_included": false
},
"buy_token_address": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
"sell_amount_human": 100,
"sell_amount_atomic": "100000000",
"sell_token_address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"ecb_reference_mid_rate": 0.920387,
"executable_transaction": null,
"expected_buy_amount_human": 92.0387
},
"recommended_autosign_wedge": {
"endpoint": "POST https://hcrb.in/fx/best-execution-quote",
"mcp_tool": "hcrb_fx_best_execution_quote",
"description": "Sub-$0.01 auto-sign FX reference receipt (10,000 minor / $0.01 USDC with tier: 'micro', or 20,000 minor standard multi-venue comparison).",
"entry_price_minor": "10000",
"minimal_post_body": {
"tier": "micro",
"chain_id": 8453,
"buy_token": "EURC",
"sell_token": "USDC",
"sell_amount_human": 100
}
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0xc59c…a6235. The signed payment is good for 5 minutes.
- Paid to
- 0xc59c…a6235
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
- Buys
- code402 calculate-fx-savings (standard floor — 1.0x reserve floor)
- Returns
- application/json
5000units
on Base · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xc59c…a6235
- Token contract
- 0x60a3…adb42
- Payment window
- 5 minutes
- Buys
- code402 calculate-fx-savings (EURC — standard floor)
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xc59c85e661d34084a7769f955d17fd38254a6235",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://hcrb.in/v1/tools/calculate-fx-savings/call",
"description": "code402 calculate-fx-savings (standard floor — 1.0x reserve floor)",
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
"payTo": "0xc59c85e661d34084a7769f955d17fd38254a6235",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://hcrb.in/v1/tools/calculate-fx-savings/call",
"description": "code402 calculate-fx-savings (EURC — standard floor)",
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 300
}
]Provenance
- Seen in the source catalog
- 2026-10-18 01:29Z
- Last indexed by Roundhouse
- 2026-10-18 19:15Z
- Last enriched (probe, favicon, geo)
- 2026-10-18 20:15Z
- x402 version
- 1
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 14 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service hcrb.in and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=hcrb.in' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://hcrb.in/v1/tools/calculate-fx-savings/call, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.