# BJJ Practitioner Lineage Lookup

> BJJ Practitioner Lineage Lookup is a paid API for AI agents from apiwitchcraft.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns the martial arts lineage chain for a named Brazilian Jiu-Jitsu (BJJ) fighter or practitioner.

## Facts

- Endpoint: GET https://apiwitchcraft.duckdns.org/bjj-lineage
- 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/bjj-practitioner-lineage-lookup-ac5cebd8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ycG5e-7U5XP674jn5Ed8B

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 bjj-practitioner-lineage-lookup-ac5cebd8
```

Example prompt: Can you look up the BJJ lineage for Gordon Ryan — I want to know who trained him and the full instructor chain going back through his lineage?

## When to prefer this

Use this endpoint when you need to look up or trace the martial arts lineage of a Brazilian Jiu-Jitsu practitioner by name. Ideal for BJJ research, competitor profiling, understanding instructor relationships, or verifying lineage claims in the grappling community.

## Known failure modes

- Fighter name not found in database — returns empty or 404-style response
- Ambiguous fighter name with multiple matches — may return partial or incorrect lineage
- Misspelled name input — no results returned
- Obscure or local practitioners not in the dataset — no lineage data available
- Payment not processed — 402 Payment Required response

## How this service works

Brazilian Jiu-Jitsu lineage lookup: trace any practitioner's instructor tree back through the Gracie and Maeda lineage to the source. Returns belt rank, academy, professors, and the full lineage chain. x402 pay-per-call on Base USDC. For gym directories, ranking systems, and AI agents verifying instructor credentials and martial-arts provenance.

## Output

A structured response showing the practitioner's lineage chain, including instructor names, their instructors, and potentially belt levels or notable lineage milestones tracing back through the BJJ family tree.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "fighter"
     ],
     "properties": {
      "fighter": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bjj-practitioner-lineage-lookup-ac5cebd8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apiwitchcraft.duckdns.org](https://www.zero.xyz/host/apiwitchcraft.duckdns.org/llms.txt)