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Api Endpoint

Space Markets Index (SMI)

Space Markets Index (SMI), published by Space Markets, Inc.: orbital launch activity from public data. Weekly 2026 launch series, per-launch records (rocket, mission, payloads, mass status) and SMI prints, as small JSON. Each read costs $0.01 test USDC via x402 on Base Sepolia (testnet). Data: GCAT (J. McDowell, planet4589.org), CC BY 4.0, modified by Space Markets. Not affiliated with or endorsed by SpaceX. Data only, not advice. Free: https://smx.space/smi-api/latest

Open interactive test console

Offering

Provider
smx.space
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Science And Education
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://smx.space/smi-api/launch/2026-221
MIME type
application/json
First seen
2026-10-16T01:51:10.599Z
Last seen
Tags
smx, testnet, base-sepolia, space-markets, launch-data, space

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:84532 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:84532",
    "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
    "amount": "10000",
    "payTo": "0x5799fe0715C04f479f7f80Fbe6C4CFb384A8E0e9"
  }
]

Observed health

Status
Healthy
Latest latency
119 ms
Average latency
271 ms
HTTP status
402
Last checked
Reachability
100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {}
    },
    "pathParams": {
      "type": "object",
      "properties": {
        "id": {
          "type": "string",
          "description": "GCAT launch id YYYY-NNN, e.g. 2026-221 (listed on https://smx.space/smi/)",
          "examples": [
            "2026-221"
          ]
        }
      },
      "required": [
        "id"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "properties": {
        "schema_version": {
          "type": "string"
        },
        "id": {
          "type": "string"
        },
        "date_utc_gcat": {
          "type": "string"
        },
        "rocket": {
          "type": "string"
        },
        "mission": {
          "type": "string"
        },
        "agency": {
          "type": "string"
        },
        "mass_status": {
          "type": "string"
        },
        "payload_count": {
          "type": "integer"
        },
        "payloads": {
          "type": "array"
        },
        "attribution": {
          "type": "object",
          "properties": {
            "dataset": {
              "type": "string"
            },
            "license": {
              "type": "string"
            },
            "notice": {
              "type": "string"
            }
          }
        }
      },
      "required": [
        "schema_version",
        "id",
        "attribution"
      ]
    }
  },
  "required": [
    "type"
  ]
}