Store a persistent key-value memory for an AI agent (namespace-isolated, optional TTL and

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x1394A802c94ab096abBd91CcC632843b03f46614",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "key": "user-preference",
          "metadata": {
            "topic": "ui"
          },
          "namespace": "my-agent",
          "ttl_seconds": 86400,
          "value": "prefers dark mode"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "created_at": "2026-01-01T00:00:00Z",
          "key": "user-preference",
          "namespace": "my-agent",
          "value": "prefers dark mode"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "key": {
                  "description": "Memory identifier",
                  "type": "string"
                },
                "metadata": {
                  "description": "Arbitrary metadata for filtering",
                  "type": "object"
                },
                "namespace": {
                  "description": "Isolation scope (e.g. agent ID)",
                  "type": "string"
                },
                "ttl_seconds": {
                  "description": "Auto-expire after N seconds",
                  "type": "integer"
                },
                "value": {
                  "description": "Any JSON value or string"
                }
              },
              "required": [
                "namespace",
                "key",
                "value"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "bodyType",
            "body",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://agent-memory-api-production-f2c4.up.railway.app/v1/memories"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://agent-memory-api-production-f2c4.up.railway.app/v1/memories");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://agent-memory-api-production-f2c4.up.railway.app/v1/memories")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header