Discover / api.percall.io

percall — Arc agent data (pay per call)

■ Challenge detected

Keyless Arc mainnet (chainId 5042) JSON-RPC + early-chain data endpoints for AI agents. Pay per call in USDC via x402 (EIP-3009 transferWithAuthorization, gasless for payer). No API key, no account. Endpoints: /arc (JSON-RPC, 0.002-0.005 USDC/call by tier), /deployments (new contract feed), /alerts (address flow delta feed), /audit (token hygiene report), /whales (flow ranking), /wallet-report, /token-report. Free tier: 50 calls/day per wallet via X-From header.

Listed price
$0.005
Challenge detected
3 of the last 3 checks
Median response
245 ms
Last checked
16 Oct, 18:49 UTC
In our index since
14 Oct 2026

Endpoint

curl -i https://api.percall.io/alerts
# 402 Payment Required: pay with an x402 client (USDC),
# then send the same request again with the payment attached.
7 listed endpoints · on x402-list.com

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://api.percall.io

  • GET/alerts$0.005Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402
  • GET/token-report$0.05Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402
  • GET/whales$0.005Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402
  • GET/arc$0.003Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402
  • GET/audit$0.02Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402
  • GET/deployments$0.01Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402
  • GET/wallet-report$0.05Keyless Arc mainnet (chainId 5042), pay per call in USDC via x402

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 7 of 7 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/api.percall.io

Recent checks

14 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026
All 3 checks
When (UTC)ResultHTTPResponse
16 Oct, 18:49 UTCChallenge detected402245ms
15 Oct, 14:11 UTCChallenge detected402252ms
14 Oct, 08:45 UTCChallenge detected402189ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 18:49 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for percall — Arc agent data (pay per call)?

Its listed price is $0.005.

What payment terms does percall — Arc agent data (pay per call) advertise?

The listing advertises x402 and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is percall — Arc agent data (pay per call) listed?

In x402-list.com. Superstables first indexed it on 14 Oct 2026.

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