# Momentra API Quote & Purchase Guide

> Momentra API Quote & Purchase Guide is a free API for AI agents from agents.momentra.org, callable via x402, Free, status healthy (last checked 2026-10-18).

Returns a free, wallet-proof quote with contract details, pricing, prerequisites, and next steps for using Momentra's local events API.

## Facts

- Endpoint: POST https://agents.momentra.org/zeroclick/agent/quote?utm_source=zero.xyz
- Price: Free
- Payment: x402
- Status: healthy
- Last checked: 2026-10-18
- Activations on Zero: 0
- Provider: agents.momentra.org
- Website: https://agents.momentra.org
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agents-momentra-org-momentra-api-quote-purchase-guide-8143be6b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cspveL_ZE0BRvlRgY7sGu

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 agents-momentra-org-momentra-api-quote-purchase-guide-8143be6b -d '<json body>'
```

Example prompt: Before I commit any budget, can you get me a free quote from Momentra for searching local events — I want to pull about 500 API calls per month, my budget is $20, and I'll be paying via x402?

## When to prefer this

Use this endpoint before purchasing any Momentra API capability — it is the zero-cost discovery and planning step that identifies the right contract, price, and prerequisites without requiring a wallet or executing any transaction. Prefer this over calling the upstream API directly when you are unsure which endpoint to use, how many calls a task requires, or what payment method to configure. It is the canonical first step for autonomous agents and human-supervised workflows alike.

## Known failure modes

- Missing required 'goal' field returns validation error
- Goal description too vague may return status 'needs_input' requesting clarification
- Unsupported task type may return status 'unsupported' with explanation
- Service temporarily unavailable returns status 'unavailable'
- Budget or quantity values outside allowed ranges cause schema validation errors

## How this service works

Search fresh local events from calendars, venues, publishers, and regional sources, directly from your AI assistant. Build newsletters, event feeds, destination guides, and calendars without scraping or maintaining listings yourself. Built for newsletter writers, local publishers, destination marketers, and developers. This server is a pay-per-use, transparent proxy in front of Momentra's own API: call the upstream API's paths here and the proxy handles identity, payment, and proxying. Agents can purchase autonomously or with their human's approval. No seller API operations have been verified for this document; consult the upstream API reference. The live catalog at /manifest.json is authoritative for prices and any free included units (prices[].includedUnits). See the upstream API's own OpenAPI document at https://momentra.org/openapi.json for the available operations and schemas, and call those paths through this server.

## Output

Returns a JSON object with a status field (e.g. 'quoted', 'ready', 'needs_input'), a priceUsd of '$0' confirming no charge, a markdown 'guide' field containing the matched API contract, pricing breakdown, prerequisites, and step-by-step next steps, and a 'guideUrl' pointing to a wallet-free advisor endpoint for further planning.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "goal"
 ],
 "properties": {
  "goal": {
   "type": "string",
   "maxLength": 2000,
   "minLength": 1,
   "description": "Describe the task and known inputs. Do not include credentials."
  },
  "payment": {
   "enum": [
    "x402",
    "mpp",
    "card"
   ],
   "type": "string",
   "description": "Known payment method for the eventual purchase, independent of this free lookup's wallet proof."
  },
  "quantity": {
   "type": "integer",
   "maximum": 1000000,
   "minimum": 1,
   "description": "Number of API calls, not returned items. Omit when unknown; describe desired output in goal."
  },
  "budgetUsd": {
   "type": "string",
   "pattern": "^(0|[1-9]\\d{0,8})(\\.\\d{1,6})?$",
   "description": "Total cash budget in USD. A quote does not authorize spending."
  },
  "requirements": {
   "type": "string",
   "maxLength": 300,
   "minLength": 1
  },
  "humanAvailable": {
   "type": "boolean",
   "description": "Whether a human is in the loop. False recommends anonymous auth for a new autonomous identity; omit when unknown. Executing a human's request without further interruptions does not by itself mean false."
  },
  "budgetExclusive": {
   "type": "boolean"
  },
  "reviewAfterCalls": {
   "type": "integer",
   "maximum": 1000000,
   "minimum": 1
  }
 },
 "additionalProperties": false
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "guide": "Task support is not established. Use the advisor to resolve missing details before purchasing.",
  "status": "unknown",
  "guideUrl": "https://agents.momentra.org/zeroclick/agent/guide",
  "priceUsd": "0"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agents-momentra-org-momentra-api-quote-purchase-guide-8143be6b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.momentra.org](https://www.zero.xyz/host/agents.momentra.org/llms.txt)