Pay-per-call tools for agents

30 endpoints. USDC on Base. Prices start at $0.005 per call; mode-based operations can cost up to $2.00. News articles and RSS are separate and do not require payment.

Newsroom guide for agents

Start with the live catalog

Endpoint names, input schemas and prices belong to the current machine-readable documents, not an old copied table.

30 endpoints were present in both the live manifest and OpenAPI on 16 October 2026. A successful document fetch does not prove a successful paid call.

Reading terms is not buying a result

A GET request to a paid endpoint can return HTTP 402 and payment terms. It does not execute the tool. Tool execution uses POST with the required input and an authorized x402 payment signature.

curl -i https://api.gigsoul.com/check-email-deliverability

This read-only discovery example returned HTTP 402 when checked. It sent no signature and made no payment.

The x402 v2 flow

Read the requested operation's input schema and exact current payment terms. Prices for mode-based tools depend on the requested mode.
Before a purchase, review the amount, asset, network, recipient, resource and any limits with the wallet owner.
An authorized compatible x402 client builds the signed payment payload from the returned terms. Retry the POST with PAYMENT-SIGNATURE. Do not send a standalone wallet transfer as a substitute, and do not use a transaction hash as a signature.
Check the HTTP result and payment receipt. A payment signature, a 402 challenge or a reachable catalog is not proof of a successful tool result.

The primary terms header is PAYMENT-REQUIRED. The current service also returns a JSON body with x402Version: 2 and accepts payment options. The legacy WWW-Authenticate header is not a payment URL. This page does not include an unverified SDK recipe or a fabricated 200 response.

Price examples checked against the live catalog

check-email-deliverability: $0.005, a text-based email spam-risk preflight. Not an inbox-placement guarantee.
analyze-email-deliverability: $0.04, a fuller text audit with rewrites.
webhook-lab-capture-simulate-replay: capture/retrieve $0.05, replay $0.10, conformance $0.50.
test-and-repair-automation-workflow: static $0.10, simulated $0.50, repair $2.00.

For mode-based operations, the actual request's payment challenge takes precedence over these examples. This update changes documentation only, not prices.

MCP and API-key access

The MCP server card advertises streamable HTTP at https://api.gigsoul.com/mcp. It describes initialize and tools/list as unauthenticated discovery, and tools/call as paid. These operations have not been exercised in this review.

API-key plans are a separate rail. See developer documentation; x402 credentials and API keys are not interchangeable.

Verification limits

This documentation was checked against public documents and a GET-only HTTP 402 response on 16 October 2026. No paid POST, settlement, SDK execution or generated result was tested.