openfang-rail MCP server

openfang-rail is an MCP server with 35 tools an agent can call, among them aba_routing_check, abn_check, balance_check. It answers at https://hcrb.in/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 10 September 2026; the last check, on 19 October 2026, succeeded.

Status

Answering

Tools

Reliability

6 of 6 checks

Response time

520 ms

Transport

streamable HTTP

Last checked

19 October 2026

Deterministic IBAN/LEI/VAT/SWIFT/rental-fraud checks via MCP; x402 USDC per call, signed receipts.

Description as the publisher wrote it.

The 35 tools openfang-rail offers

Tool	What it does
`aba_routing_check`	Validate a US ABA routing number by its (3,7,1)-weight mod-10 checksum. Inputs: aba_routing
`abn_check`	Validate an Australian Business Number by its mod-89 checksum (11 digits). Inputs: abn
`balance_check`	On-chain balance snapshot: native ETH balance plus one ERC-20 token balance (defaults to USDC on Base), with raw units and decimals provenance. Preflighted so you never pay during an RPC outage. Inputs: address, token_address
`batch_validate`	Run up to 50 identifier checks (IBAN / LEI / VAT / UK company / SWIFT / ABA / EIN / IFSC / ABN / Luhn / ISBN / E.164 / SEDOL / ISIN / EAN-13 / GSTIN / context-distill) in ONE paid call: one voucher, one settlement, one signed XDR-1 receipt Inputs: items
`block_info`	Latest (or specified) Base block header: number, timestamp, transaction count, base fee. Preflighted so you never pay during an RPC outage. Inputs: block
`cnpj_check`	Validate Brazilian CNPJ (14 digits) with dual Mod-11 check digits. Inputs: cnpj
`company_number_format`	Validate UK Companies House number format (not existence). Inputs: company_number
`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. Inputs: text
`crypto_ticker`	Current spot price (USD) for a symbol via the public CoinGecko API; common tickers (btc, eth, …) are mapped to CoinGecko ids automatically. Cached 60s server-side; preflighted so you never pay during an API outage. Inputs: symbol
`e164_check`	Validate a phone number's E.164 structure (+CC, 8-15 digits, no leading zero). Inputs: phone
`ean13_check`	Validate an EAN-13 barcode by its mod-10 checksum (odd positions x1, even positions x3). Inputs: code
`ein_format_check`	Validate US Employer Identification Number FORMAT (NN-NNNNNNN). No public EIN checksum exists. Inputs: ein
`erc20_balance`	Raw + formatted ERC-20 balanceOf for an address at any token contract (decimals read on-chain when available; common-list/18 fallback is labeled). Preflighted so you never pay during an RPC outage. Inputs: address, token_address, decimals
`gstin_check`	Validate an Indian GSTIN by structure (2-digit state code + PAN + entity code + 'Z') and its mod-36 cross-sum checksum. Inputs: gstin
`iban_check`	Validate an IBAN by ISO 13616 structure and MOD-97-10 checksum (offline, no bank lookup). Inputs: iban
`ifsc_check`	Validate an Indian IFSC by RBI structure (BBBB0NNNNNN; 5th character always 0). Inputs: ifsc
`isbn_check`	Validate an ISBN-10 (mod-11) or ISBN-13 (1,3-weight mod-10) checksum. Inputs: isbn
`isin_check`	Validate an ISIN (ISO 6166) by structure and Luhn mod-10 check digit over the A=10…Z=35 converted string. Inputs: isin
`iso20022_to_x402_intent`	Autonomous banking migration: translate legacy ISO 20022 pain.001/pacs.008 XML directly into zero-float EIP-3009 Base L2 USDC payment intent. Inputs: xml
`iso20022_validate`	Validate an ISO 20022 banking XML document (pain.001 or pacs.008) with XXE guards and IBAN checksums. Inputs: xml
`japan_corp_check`	Validate Japanese Houjin Bangou (13 digits, National Tax Agency Mod-9 check digit). Inputs: corporate_number
`kra_pin_check`	Validate Kenyan Revenue Authority Tax PIN structure (A/P + 9 digits + 1 letter). Inputs: kra_pin
`lei_check`	Validate a Legal Entity Identifier (ISO 17442 + ISO 7064 MOD-97-10 check digits). Inputs: lei
`luhn_check`	Validate any 12-19 digit number by the Luhn mod-10 algorithm (card-style checksums). Never submit real card numbers. Inputs: number
`rent_deposit_guard`	Rental deposit safety: IBAN checksum + property/deposit country alignment + pre-viewing flag. Inputs: deposit_iban, property_country, deposit_before_viewing
`rental_listing_risk`	Explainable rental-fraud risk score over listing red-flag signals (deterministic rule engine). Inputs: payment_irreversible, contact_moves_offplatform, landlord_abroad_cannot_meet, no_in_person_viewing, urgency_pressure, photos_reverse_image_hit
`rental_verdict`	One combined, signed rental due-diligence verdict: deposit + landlord entity (LEI/company) + listing risk. Inputs: deposit_iban, property_country, deposit_before_viewing, landlord_lei, landlord_company_no, payment_irreversible
`rfc_check`	Validate Mexican SAT RFC for companies (12 chars) or individuals (13 chars). Inputs: rfc
`sedol_check`	Validate a UK/Ireland security identifier by its (1,3,1,7,3,9)-weight mod-10 checksum. Inputs: sedol
`settlement_history_check`	On-chain counterparty check: USDC transfers SENT and RECEIVED by an address over the last ~48h of Base blocks (counts, volumes, sample tx hashes). Preflighted so you never pay during an RPC outage. Inputs: address
`swift_bic_check`	Validate a SWIFT/BIC code by ISO 9362 structure (bank code, ISO country, location, optional branch). Inputs: bic
`tx_activity`	On-chain activity snapshot for an address: total outbound transaction count (nonce), whether the address is a contract (eth_getCode), and a first-funded heuristic (nonce > 0). Preflighted so you never pay during an RPC outage. Inputs: address
`uscc_check`	Validate Chinese Unified Social Credit Code (GB 32100-2015 ISO 7064 Mod-31-3). Inputs: uscc
`vat_mod97_check`	Structural VAT check (BE mod-97 family). Inputs: vat_number
`vendor_onboarding_pack`	Screen a vendor's identifiers in ONE signed call: IBAN + LEI + VAT + UK company number — each checksummed, one verdict, one receipt. Half the price of four single checks. Inputs: iban, lei, vat_number, company_number

Add openfang-rail to your AI client

Every block below points at https://hcrb.in/mcp. Pick your client and copy.

Claude Code: one command in your terminal

claude mcp add --transport http openfang-rail https://hcrb.in/mcp

Claude Desktop: claude_desktop_config.json

{
  "mcpServers": {
    "openfang-rail": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://hcrb.in/mcp"]
    }
  }
}

Cursor: ~/.cursor/mcp.json, or .cursor/mcp.json in a project

{
  "mcpServers": {
    "openfang-rail": {
      "url": "https://hcrb.in/mcp"
    }
  }
}

VS Code and GitHub Copilot: .vscode/mcp.json

{
  "servers": {
    "openfang-rail": {
      "type": "http",
      "url": "https://hcrb.in/mcp"
    }
  }
}

Zed: Zed settings.json

{
  "context_servers": {
    "openfang-rail": {
      "url": "https://hcrb.in/mcp"
    }
  }
}

Windsurf: ~/.codeium/mcp_config.json

{
  "mcpServers": {
    "openfang-rail": {
      "serverUrl": "https://hcrb.in/mcp"
    }
  }
}

JetBrains AI Assistant: Settings, Tools, AI Assistant, MCP, New MCP Server, as JSON

{
  "mcpServers": {
    "openfang-rail": {
      "url": "https://hcrb.in/mcp"
    }
  }
}

Continue: .continue/mcpServers/neuronto.yaml

name: openfang-rail
version: 0.0.1
schema: v1
mcpServers:
  - name: openfang-rail
    type: streamable-http
    url: https://hcrb.in/mcp

Gemini CLI: ~/.gemini/settings.json

{
  "mcpServers": {
    "openfang-rail": {
      "httpUrl": "https://hcrb.in/mcp"
    }
  }
}

Codex CLI: MCP server config

{
  "mcpServers": {
    "openfang-rail": {
      "type": "http",
      "url": "https://hcrb.in/mcp"
    }
  }
}

Warp: MCP servers, + Add, paste JSON

{
  "mcpServers": {
    "openfang-rail": {
      "url": "https://hcrb.in/mcp"
    }
  }
}

Goose: a one-click extension link

goose://extension?url=https%3A%2F%2Fhcrb.in%2Fmcp&type=streamable_http&id=openfang-rail&name=openfang-rail

Is openfang-rail up right now?

It answered our last check on 19 October 2026 in 520 ms. Over 6 checks since 10 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.

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Questions about openfang-rail

How many tools does openfang-rail have?

35, as returned by the server's own tools/list on 12 September 2026: aba_routing_check, abn_check, balance_check, batch_validate, block_info, cnpj_check, company_number_format, context_distill, and 27 more.

Is openfang-rail down?

It answered our last check on 19 October 2026 in 520 ms. Over 6 checks since 10 September 2026 it answered 6.

How do I add openfang-rail to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://hcrb.in/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does openfang-rail need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: io.github.89rat. Endpoint host: hcrb.in. ARD identifier: urn:air:io.github.89rat:mcp:openfang-rail. First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.

Is this your server? Get a message the day it stops answering or its tools change: monitoring, 14 days free. Or claim the domain to manage how it is listed.