Tools (3)

lookup_bin
get_card_brands
report_feedback

lookup_bin

Identify the card brand, type, and category from a Bank Identification Number (BIN).

Matches the input against well-known public BIN prefix ranges for Visa,
Mastercard, American Express, Discover, JCB, UnionPay, Diners Club, and Maestro.

Args:
bin_digits: The first 6-8 digits of a payment card number.

Parameter	Type	Required	Description
`bin_digits`	`string`	required	First 6-8 digits of a payment card number.

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "lookup_bin",
    "arguments": {
      "bin_digits": "123456789"
    }
  }
}

get_card_brands

List all card brands that can be identified from BIN prefixes.

Returns the sorted list of known card brands (e.g. Visa, Mastercard, etc.).

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "get_card_brands",
    "arguments": {}
  }
}

report_feedback

Report a bug, feature request, or general feedback for this data source.

Use this when something doesn't work as expected, when you'd like
a new feature, or when you have suggestions for improvement.

Args:
feedback: Describe the issue or suggestion.
feedback_type: One of 'bug', 'feature_request', or 'general'.

Parameter	Type	Required	Description
`feedback`	`string`	required
`feedback_type`	`string`	optional	(default: "general")

JSON-RPC Request

{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "report_feedback",
    "arguments": {
      "feedback": "example"
    }
  }
}

Quick Start

Shell

curl -X POST "https://context.gnist.ai/mcp/bin-lookup/" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Gnist-API-Key: YOUR_API_KEY" \
  -d '{"jsonrpc": "2.0", "method": "tools/call", "id": 1, "params": {"name": "lookup_bin", "arguments": {"bin_digits": "example"}}}'

Python

import httpx

resp = httpx.post(
    "https://context.gnist.ai/mcp/bin-lookup/",
    headers={"Gnist-API-Key": "YOUR_API_KEY", "Content-Type": "application/json"},
    json={
  "jsonrpc": "2.0",
  "method": "tools/call",
  "id": 1,
  "params": {
    "name": "lookup_bin",
    "arguments": {
      "bin_digits": "example"
    }
  }
},
)
print(resp.json())