# MAC to EUI-64 / IPv6 Link-Local Converter

> MAC to EUI-64 / IPv6 Link-Local Converter is a paid API for AI agents from macaddress.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Derives the modified EUI-64 interface identifier and IPv6 link-local address (fe80::/64) from a 48-bit MAC address by inserting FFFE and flipping the U/L bit.

## Facts

- Endpoint: POST https://macaddress.openverbs.com/v1/to-eui64
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mac-to-eui-64-ipv6-link-local-converter-453e1bc6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4OiEghf0ETeomlPsMGPxu

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mac-to-eui-64-ipv6-link-local-converter-453e1bc6 -d '<json body>'
```

Example prompt: Convert the MAC address 00:1A:2B:3C:4D:5E to its modified EUI-64 interface identifier and tell me the resulting IPv6 link-local address.

## When to prefer this

Use this endpoint when you need to deterministically compute the IPv6 link-local (fe80::/64) address or modified EUI-64 interface identifier from a known MAC address, especially for SLAAC network configuration, IPv6 inventory enrichment, or validating autoconfigured addresses. Prefer this over manual computation or general-purpose networking libraries when operating in an agent pipeline that needs a simple, reliable API call.

## Known failure modes

- Invalid or malformed MAC address input returns an error (e.g. wrong length, illegal characters)
- MAC address outside valid EUI-48 range may be rejected
- Empty or missing 'address' field returns a validation error
- Multicast MACs may produce unexpected or flagged results

## How this service works

Derive the modified EUI-64 interface identifier from a 48-bit MAC (insert FFFE, flip the U/L bit) and the resulting IPv6 link-local address (fe80::/64).

## Output

Returns the modified EUI-64 interface identifier (64-bit) derived by inserting FFFE between the OUI and NIC-specific portions of the MAC and flipping the universal/local bit, along with the resulting IPv6 link-local address in fe80::/64 format.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "address": {
       "type": "string",
       "minLength": 1,
       "maxLength": 64,
       "description": "MAC address in colon, hyphen, dot or bare notation."
      }
     },
     "required": [
      "address"
     ],
     "additionalProperties": false
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  }
 },
 "required": [
  "input"
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mac-to-eui-64-ipv6-link-local-converter-453e1bc6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from macaddress.openverbs.com](https://www.zero.xyz/host/macaddress.openverbs.com/llms.txt)