# StablecoinPulse Payment Rail Comparator

> StablecoinPulse Payment Rail Comparator is a paid API for AI agents from stablecoinpulse.theaslangroupllc.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Compares stablecoin payment rails across emerging L1s (Plasma, Circle Arc, Stripe/Paradigm Tempo, Tether Stable) and incumbent chains (Tron, Solana, Base) on fees, finality speed, and ecosystem maturity with live-sourced, cited data.

## Facts

- Endpoint: GET https://stablecoinpulse.theaslangroupllc.com/api/rails-compare
- 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/stablecoinpulse-payment-rail-comparator-49792bd2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o7fleqR919hTdzuzbnSOC

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 stablecoinpulse-payment-rail-comparator-49792bd2
```

Example prompt: Compare stablecoin payment rails across Plasma, Circle Arc, Stripe Tempo, Tether Stable, Tron, Solana, and Base — I need fees, finality times, and ecosystem maturity for each so I can decide which chain to use for a stablecoin payments product.

## When to prefer this

Use this endpoint when you need a structured, multi-dimensional comparison of stablecoin payment rails with live data and citations — especially when evaluating both emerging stablecoin-native L1s (Plasma, Circle Arc, Tempo, Tether Stable) alongside established chains (Tron, Solana, Base). Prefer this over generic crypto data APIs when the specific angle is payment rail suitability for stablecoin transfers rather than raw price or volume data.

## Known failure modes

- Live search data unavailable — may return cached or partial results
- Newly launched chain not yet indexed — missing entries for very recent L1s
- Rate limit or payment validation failure — 402 or 429 response
- Ambiguous chain name input — may return best-guess match or error

## How this service works

Payment-rail comparison across stablecoin-native L1s (Plasma, Circle Arc, Stripe/Paradigm Tempo, Tether Stable) and incumbent chains (Tron, Solana, Base) — fees, finality, and ecosystem maturity, grounded in live search and cited.

## Output

A side-by-side comparison table of stablecoin-native L1s and incumbent chains covering transaction fees, finality times, and ecosystem maturity scores, all grounded in live search results with citations for each data point.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "lang": {
       "type": "string",
       "description": "e.g. en, es, fr, de, ja, zh, ko, pt, ar (default: en; forwarded to the model, not strictly validated)"
      },
      "rails": {
       "type": "string",
       "description": "Comma-separated subset of rail ids to compare, e.g. plasma,arc,tron (default: all 7 registered rails)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "errors": {
     "type": "object",
     "description": "Documented error responses, keyed by HTTP status code",
     "additionalProperties": {
      "type": "object",
      "required": [
       "description"
      ],
      "properties": {
       "example": {
        "type": "object"
       },
       "description": {
        "type": "string"
       }
      }
     }
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "rails": [
   {
    "id": "plasma",
    "name": "Plasma",
    "status": "Mainnet live since 2025-09-25",
    "category": "stablecoin-native-l1"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stablecoinpulse-payment-rail-comparator-49792bd2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stablecoinpulse.theaslangroupllc.com](https://www.zero.xyz/host/stablecoinpulse.theaslangroupllc.com/llms.txt)