# Tollex USDG Capabilities Endpoint

> Tollex USDG Capabilities Endpoint is a paid API for AI agents from api.tollex.org, paid per call via x402, $0.0079/call, status unknown (last checked 2026-10-11).

Discovers and purchases API capabilities on behalf of software agents, paying with USDG on Robinhood Chain under policy-governed rules, then returns a signed receipt.

## Facts

- Endpoint: POST https://api.tollex.org/tools/usdg_capabilities?utm_source=zero.xyz
- Price: $0.0079/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tollex-usdg-capabilities-endpoint-5f18969b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JjAyTiaXqyy47kd9xQmPV

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 tollex-usdg-capabilities-endpoint-5f18969b -d '<json body>'
```

Example prompt: Find a capability that can geocode addresses, check that it fits within my $5 daily spending policy, and pay for it with USDG on Robinhood Chain — then give me the signed receipt.

## When to prefer this

Choose this endpoint when your agent needs to autonomously discover and pay for API capabilities using USDG on Robinhood Chain specifically, with policy enforcement before any payment is committed. Prefer it over generic API marketplaces when you need x402-native payments, policy gating, and signed receipts for audit trails in an agent-operated context.

## Known failure modes

- Policy violation: requested capability exceeds agent's configured spending rules, request rejected before payment
- Payment failure: USDG balance insufficient or Robinhood Chain transaction fails, no capability returned
- No matching capability found: Tollex cannot find an API that satisfies the request criteria
- Uncertain payment state: transaction submitted but not yet confirmed, reconciliation required
- Invalid input schema: missing required fields (type, method, bodyType, body) returns 400 error
- x402 protocol error: payment handshake fails, signed receipt not issued

## How this service works

Tollex lets software agents buy APIs and tools under rules you set: it finds a capability that fits, checks your policy before anything is signed, pays with x402 in USDC on Base or USDG on Robinhood Chain, reconciles uncertain payments and returns a signed receipt.

## Output

A signed payment receipt confirming the capability was found, policy was satisfied, and payment in USDG on Robinhood Chain was completed, along with the capability's response data and transaction details for reconciliation.

## 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",
     "required": [],
     "properties": {},
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "tool",
      "result",
      "evidence"
     ],
     "properties": {
      "tool": {
       "type": "object",
       "properties": {
        "id": {
         "type": "string"
        },
        "version": {
         "type": "string"
        },
        "provider": {
         "type": "string"
        }
       }
      },
      "result": {
       "type": "object",
       "example": {
        "ok": true,
        "facets": [],
        "failed": [],
        "reportHash": "0x7a3d7400b27830f4f91c2c16a082486d67c1befecaec2f53b33f1f35d5b62036",
        "blockNumber": "83335219",
        "capabilities": {
         "eip3009": true,
         "permit2": true
        },
        "implementation": null
       },
       "required": [
        "ok",
        "blockNumber",
        "capabilities",
        "facets",
        "implementation",
        "reportHash",
        "failed"
       ],
       "properties": {
        "ok": {
         "type": "boolean"
        },
        "facets": {
         "type": "array"
        },
        "failed": {
         "type": "array",
         "items": {
          "type": "string"
         }
        },
        "reportHash": {
         "type": "string"
        },
        "blockNumber": {
         "type": "string"
        },
        "capabilities": {
         "type": "object"
        },
        "implementation": {
         "type": [
          "string",
          "null"
         ]
        }
       }
      },
      "evidence": {
       "type": "array",
       "items": {
        "type": "object"
       },
       "description": "Chain or source evidence bound into 
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tool": {
   "id": "usdg_capabilities",
   "version": "1.0.0",
   "provider": "tollex.robinhood-chain"
  },
  "result": {
   "ok": true,
   "facets": [],
   "failed": [],
   "reportHash": "0x7a3d7400b27830f4f91c2c16a082486d67c1befecaec2f53b33f1f35d5b62036",
   "blockNumber": "83335219",
   "capabilities": {
    "eip3009": true,
    "permit2": true
   },
   "implementation": null
  },
  "evidence": [],
  "untrustedOutput": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tollex-usdg-capabilities-endpoint-5f18969b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.tollex.org](https://www.zero.xyz/host/api.tollex.org/llms.txt)