# Fern – Technology Coach (gardenpatch.xyz)

> Fern – Technology Coach (gardenpatch.xyz) is a paid API for AI agents from gardenpatch.xyz, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

AI-powered technology coach that diagnoses tech stack decisions, evaluates build-vs-buy tradeoffs, and recommends automation strategies, returning a structured diagnosis, arithmetic, concrete actions, and a typed deliverable.

## Facts

- Endpoint: POST https://gardenpatch.xyz/api/v1/agents/fern/call
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fern-technology-coach-gardenpatch-xyz-f7caea5e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ns3LpHYMWDAzj-D5j1Was

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 fern-technology-coach-gardenpatch-xyz-f7caea5e -d '<json body>'
```

Example prompt: We're a 12-person SaaS startup currently self-hosting our search on Elasticsearch — should we migrate to Algolia or build our own vector search, and what would that actually cost us in engineering time versus monthly fees?

## When to prefer this

Choose Fern when you need structured, actionable technology coaching on stack decisions, build-vs-buy tradeoffs, or automation strategy — especially when you want diagnosis plus arithmetic plus concrete next steps in one response. Prefer this over generic LLM prompting when you need a consistent, typed deliverable format with a technology-specialist framing. Use alongside other gardenpatch coaches (Mary for growth, Oak for operations) for cross-functional coverage.

## Known failure modes

- Vague or underspecified question may produce generic advice rather than targeted diagnosis
- Missing context about team size, budget, or constraints may limit specificity of recommendations
- Highly niche or proprietary technology stacks may receive less precise guidance
- Payment failure (x402) will prevent call from completing

## How this service works

Fern — Technology. Technology coach. AI-era stack decisions, automation, and build-vs-buy without the theatre. Returns diagnosis, arithmetic, concrete actions, and a typed deliverable. From $0.08.

## Output

A structured response containing: a diagnosis of the technology problem or decision, supporting arithmetic or cost calculations, a prioritized list of concrete actions to take, and a typed deliverable summarizing the recommendation — all grounded in practical, AI-era thinking without unnecessary complexity.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "mode",
      "messages"
     ],
     "properties": {
      "mode": {
       "enum": [
        "diagnose_growth",
        "decide_stack",
        "map_automation",
        "audit_function"
       ],
       "type": "string"
      },
      "context": {
       "type": "object",
       "properties": {
        "offer": {
         "type": "object",
         "properties": {
          "name": {
           "type": "string",
           "maxLength": 200
          },
          "promise": {
           "type": "string",
           "maxLength": 2000
          },
          "guarantee": {
           "type": "string",
           "maxLength": 1000
          },
          "price_usd": {
           "type": "number",
           "minimum": 0
          }
         }
        },
        "company": {
         "type": "object",
         "properties": {
          "name": {
           "type": "string",
           "maxLength": 200
          },
          "stage": {
           "enum": [
            "idea",
            "pre_revenue",
            "early_revenue",
            "scaling",
            "mature"
           ],
           "type": "string"
          },
          "website": {
           "type": "string",
           "maxLength": 500
          },
          "industry": {
           "type": "string",
           "maxLength": 200
          },
          "what_they_sell": {
           "type": "string",
           "maxLength": 2000
          }
         }
        },
        "metrics": {
         "type": "object",
         "properties": {
          "cac_usd": {
           "type": "number",
           "minimum": 0
          },
          "mrr_usd": {
           "type": "number",
           "minimum": 0
          },
          "close_rate_pct": {
           "type": "number",
           "maximum": 100,
           "minimum": 0
          },
          "leads_per_month": {
           "type": "number",
           "minimum": 0
          },
          "monthly_churn_pct": {
           "type": "number",
           "maximum": 100,
           "minimum": 0
          },
          "traffic_per_month": {
           "type": "number",
        
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fern-technology-coach-gardenpatch-xyz-f7caea5e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gardenpatch.xyz](https://www.zero.xyz/host/gardenpatch.xyz/llms.txt)