x402base-sepoliaquality 0.40

Pay-per-file IPFS content retrieval via x402 on Base Sepolia testnet

Price
0.002 USDC / call
Protocol
x402
Verified
no
Endpoint
https://grapevine.dev-mypinata.cloud/x402/cid/bafkreid47pctc75gkd66hoxd7pj5iiyzy2n5gloonxpu2h4ct2lsahv3oe

What it does

This endpoint serves IPFS-pinned content behind an x402 paywall, hosted on a Pinata-based gateway (grapevine.dev-mypinata.cloud). When a GET request is made to the endpoint with a specific CID (Content Identifier), the server returns an HTTP 402 challenge requiring a micropayment of 0.002006 USDC on the Base Sepolia testnet before delivering the file. The response MIME type is application/octet-stream, indicating raw binary/file content.

The x402 challenge uses the "exact" payment scheme with a 60-second timeout. Payment is directed to address 0x6e62FF0591d4D8a0E5A1C274AbCFd2D716F1035E using the USDC token contract at 0x036CbD53842c5426634e7929541eC2318f3dCF7e on Base Sepolia. The endpoint follows x402 version 1 protocol and expects a valid x-payment header to authorize content access.

Note that this endpoint operates on Base Sepolia, which is a testnet — meaning the USDC tokens used are not real-value tokens. The crawled site provides no documentation, no OpenAPI spec, and no additional context beyond the x402 challenge itself. The gateway appears to be a CID-based content delivery system where each CID path may have its own pricing. Without further documentation, the scope and catalog of available content behind this gateway is unknown.

Capabilities

ipfs-content-retrievalx402-paywallmicropayment-gatedbase-sepolia-testnetusdc-paymentcid-based-routingbinary-file-delivery

Use cases

  • —Retrieving IPFS-pinned files behind a micropayment gate
  • —Testing x402 payment flows on Base Sepolia testnet
  • —Paying for individual content items stored on IPFS
  • —Agent-driven file purchases using USDC micropayments

Fit

Best for

  • —Developers testing x402 protocol integrations on testnet
  • —Agents that need to fetch paywalled IPFS content programmatically
  • —Prototyping pay-per-file content delivery systems

Not for

  • —Production/mainnet file purchases (this is on Base Sepolia testnet)
  • —Browsing or discovering available content (no catalog or listing endpoint)
  • —Streaming or large-scale bulk downloads (no documented batch support)

Quick start

# 1. GET the endpoint to receive the x402 challenge
curl -i https://grapevine.dev-mypinata.cloud/x402/cid/bafkreid47pctc75gkd66hoxd7pj5iiyzy2n5gloonxpu2h4ct2lsahv3oe
# Returns 402 with x402 challenge JSON
# 2. Construct an x-payment header per x402 spec and resend:
curl -H "x-payment: <signed-payment-token>" \
  https://grapevine.dev-mypinata.cloud/x402/cid/bafkreid47pctc75gkd66hoxd7pj5iiyzy2n5gloonxpu2h4ct2lsahv3oe
# Returns the file as application/octet-stream

Example

Response

{
  "error": "Provide a valid x-payment header to access this content",
  "accepts": [
    {
      "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
      "extra": {
        "name": "USDC",
        "version": "2"
      },
      "payTo": "0x6e62FF0591d4D8a0E5A1C274AbCFd2D716F1035E",
      "scheme": "exact",
      "network": "base-sepolia",
      "mimeType": "application/octet-stream",
      "resource": "https://grapevine.dev-mypinata.cloud/x402/cid/bafkreid47pctc75gkd66hoxd7pj5iiyzy2n5gloonxpu2h4ct2lsahv3oe",
      "description": "0.002006 USDC on base-sepolia",
      "maxAmountRequired": "2006",
      "maxTimeoutSeconds": 60
    }
  ],
  "x402Version": 1
}

Endpoint

URLhttps://grapevine.dev-mypinata.cloud/x402/cid/bafkreid47pctc75gkd66hoxd7pj5iiyzy2n5gloonxpu2h4ct2lsahv3oe
Transporthttp
Protocolx402
Pay to0x6e62FF0591d4D8a0E5A1C274AbCFd2D716F1035E
CurrencyUSDC

Quality

0.40/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint works. However, there is zero documentation, no OpenAPI spec, no site content beyond error messages, and the endpoint is on a testnet. All descriptive details are inferred solely from the 402 challenge payload.

Warnings

  • —No documentation or OpenAPI spec available from the provider
  • —Operates on Base Sepolia testnet — USDC tokens have no real monetary value
  • —The content behind this CID is unknown (application/octet-stream with no description of what the file contains)
  • —All crawled pages returned error messages; the gateway provides no discoverability or catalog

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:06:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/9Fg6D2