Roundhouse AI

api.mnemospark.ai

mnemospark-lite paid file upload API for wallet-scoped storage. Returns a presigned S3 upload URL, completion token, and bearer for listing and downloading uploaded files. Files expire automatically after 30 days.

InferenceLiveeip155:8453Exactvia cdp
https://api.mnemospark.ai/api/mnemospark-lite/upload
Settlements · 30d
4
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$1.95
Verified settled volume
2 settlements proven x402 by their on-chain EIP-3009 marker.
$1.30
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-05-11 23:26Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xd8f4cb6b436831b649883c3ffb861f7c59ee28b4

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

1.3USDC≈ $1.3 USD
on Base · exact scheme

Pay 1.3 USDC on Base to 0xd8f4…e28b4. The signed payment is good for 1 hour.

Paid to
0xd8f4…e28b4
USD Coin contract
0x8335…02913
Payment window
1 hour
As published
1300000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xd8f4cb6b436831b649883c3ffb861f7c59ee28b4",
    "amount": "1300000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 3600
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "tier": "100mb",
          "filename": "example.pdf",
          "size_bytes": 24576,
          "contentType": "application/pdf"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "data": {
            "maxSize": 100000000,
            "siteUrl": null,
            "uploadId": "abc123",
            "expiresAt": "2026-05-23T12:00:00Z",
            "publicUrl": null,
            "uploadUrl": "https://s3-presigned.example/...",
            "curlExample": "curl -X PUT --data-binary @\"example.pdf\" ...",
            "completion_token": "opaque-token",
            "list_scope_bearer": "opaque-bearer"
          },
          "success": true,
          "metadata": {
            "price": "$0.02",
            "network": "eip155:8453",
            "payment": {
              "status": "verified",
              "success": true,
              "transactionHash": null
            },
            "protocol": "x402"
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$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": [
                "filename",
                "contentType",
                "tier",
                "size_bytes"
              ],
              "properties": {
                "tier": {
                  "enum": [
                    "10mb",
                    "100mb",
                    "500mb",
                    "1gb",
                    "2gb",
                    "3gb"
                  ],
                  "type": "string",
                  "description": "Upload pricing/size tier"
                },
                "filename": {
                  "type": "string",
                  "description": "Single file name"
                },
                "size_bytes": {
                  "type": "integer",
                  "maximum": 4800000000,
                  "minimum": 0,
                  "description": "Declared upload size in bytes"
                },
                "contentType": {
                  "type": "string",
                  "description": "MIME type"
                }
              },
              "additionalProperties": false
            },
            "type": {
              "const": "http"
            },
            "method": {
              "const": "POST"
            },
            "bodyType": {
              "const": "json"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type",
            "example"
          ],
          "properties": {
            "type": {
              "const": "json"
            },
            "example": {
              "type": "object"
            }
          },
          "additionalProperties": true
        }
      },
      "additionalProperties": false
    }
  }
}

Provenance

Seen in the source catalog
2026-05-11 23:26Z
Last indexed by Roundhouse
2026-06-10 23:10Z
Last enriched (probe, favicon, geo)
2026-09-20 17:45Z
x402 version
2
Max timeout
3600s
Liveness probe
HTTP 403
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service api.mnemospark.ai and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.mnemospark.ai'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.mnemospark.ai/api/mnemospark-lite/upload, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.