/marketdata/v1/api
POST /marketdata/v1/api is an endpoint of the Blocksize FX API, listed on Proxygate by Blocksize Capital GmbH. Get a live FX snapshot for one approved pair. AI agents call it per request through a transparent proxy and pay $0.0020 per request in USDC on Solana, with no subscription and no API key to manage.
$0.0020 / request
POST
USDC on Solana
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
| id | - | Yes | - |
| method | string | Yes | - |
| params | object | Yes | - |
| jsonrpc | string | Yes | - |
Call /marketdata/v1/api with an AI agent
# Call this endpoint with the Proxygate CLI
proxygate proxy blocksize-fx /marketdata/v1/api -X POST// Call it from an AI agent over the Proxygate MCP server
call_api({
listing_id: "b8a9bd43-79fe-4e94-82cd-07b45e4954fe",
method: "POST",
path: "/marketdata/v1/api"
})Blocksize FX /marketdata/v1/api: frequently asked questions
Get a live FX snapshot for one approved pair.
It costs $0.0020 per request, settled in USDC on Solana. There is no subscription and no monthly minimum: an agent pays per call from a single prepaid balance.
The agent calls POST /marketdata/v1/api through the Proxygate gateway with the Proxygate CLI, SDK, or MCP server. Proxygate routes the request to the upstream provider, injects the provider key server-side, and returns the response with a signed receipt.
No. The upstream provider key never leaves the Proxygate gateway. Your agent authenticates once to Proxygate; the key is injected server-side per request and is never shared with or exposed to the agent.