URL-to-Markdown Converter

Run a trial without paying

Try eligible APIs with free service credit. Each verified EVM externally owned wallet receives $0.050 once, shared across APIs with no expiry. No deposit, payment, on-chain transaction, API key, or registration is required. Wallet sign-in (SIWX) is required; contract wallets are not supported. Credit is nontransferable. Execution requires sufficient credit, daily trial budget, and API availability.

Covered: up to 8 calls if you use the entire initial $0.050 grant on this API. Shared credit, daily budget, and availability apply.

Start here for a business result, not just a 402 response. The trial client handles wallet sign-in and never signs a payment or automatically retries.

Already have an Agent signer?

Install @x402/extensions and pass your existing EVM EOA signer to its official wrapFetchWithSIWx helper. No seller-specific download, private-key export, or new wallet is needed.

// npm install @x402/extensions
// existingSigner is your EVM EOA signer with address and signMessage({ message }).
// Use plain fetch, never a payment-wrapped fetch, for trial-only access.
import { wrapFetchWithSIWx } from "@x402/extensions/sign-in-with-x";

const trialFetch = wrapFetchWithSIWx(fetch, existingSigner);
const response = await trialFetch("https://manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/api/v1/content/url-to-markdown", {
  method: "POST",
  headers: { "content-type": "application/json", accept: "application/json" },
  body: JSON.stringify({
  "url": "https://example.com/article"
}),
  redirect: "error",
  signal: AbortSignal.timeout(30_000),
});
if (!response.ok) throw new Error(`Trial stopped: HTTP ${response.status}. Do not automatically retry or pay.`);
if (response.headers.get("x-access-mode") !== "trial" ||
    response.headers.get("x-trial-status") !== "charged" ||
    response.headers.get("x-trial-accounting-status") !== "confirmed" ||
    response.headers.has("payment-response") || response.headers.has("x-payment-response")) {
  throw new Error("Trial accounting is unconfirmed. Do not repeat this request or pay.");
}
console.log(await response.json());
// No payment signer, paid fallback, or application retry loop is installed.

Trial only: use plain fetch, not a payment-wrapped fetch. Adding a SIWX hook to a payment client can still fall through to payment; it is not a trial-only policy. Use the separate paid guide only after explicitly choosing to pay.

If the promise rejects, stop and inspect the error. Do not repeat uncertain business work or automatically switch to payment.

Run locally with an existing EOA key

Use Node.js 22+ in a new project directory. Supply TRIAL_PRIVATE_KEY securely in your local environment before running; never paste it into this site or into source code. Review downloaded code before executing it.

Download the complete trial.js example. Replace its documented example input with your own data where needed.

npm init -y
npm pkg set type=module
npm install @x402/extensions viem
curl --fail 'https://manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/apis/url-to-markdown/trial.js' -o trial.js
node trial.js

// Node.js 22+ ES module. Use an existing EOA key locally; never send it to the seller.
// npm init -y && npm pkg set type=module && npm install @x402/extensions viem
import { privateKeyToAccount } from "viem/accounts";
const privateKey = process.env.TRIAL_PRIVATE_KEY;
if (!/^0x[0-9a-fA-F]{64}$/.test(privateKey ?? "")) throw new Error("Set an existing EOA's TRIAL_PRIVATE_KEY locally.");
const existingSigner = privateKeyToAccount(privateKey);
// npm install @x402/extensions
// existingSigner is your EVM EOA signer with address and signMessage({ message }).
// Use plain fetch, never a payment-wrapped fetch, for trial-only access.
import { wrapFetchWithSIWx } from "@x402/extensions/sign-in-with-x";

const trialFetch = wrapFetchWithSIWx(fetch, existingSigner);
const response = await trialFetch("https://manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/api/v1/content/url-to-markdown", {
  method: "POST",
  headers: { "content-type": "application/json", accept: "application/json" },
  body: JSON.stringify({
  "url": "https://example.com/article"
}),
  redirect: "error",
  signal: AbortSignal.timeout(30_000),
});
if (!response.ok) throw new Error(`Trial stopped: HTTP ${response.status}. Do not automatically retry or pay.`);
if (response.headers.get("x-access-mode") !== "trial" ||
    response.headers.get("x-trial-status") !== "charged" ||
    response.headers.get("x-trial-accounting-status") !== "confirmed" ||
    response.headers.has("payment-response") || response.headers.has("x-payment-response")) {
  throw new Error("Trial accounting is unconfirmed. Do not repeat this request or pay.");
}
console.log(await response.json());
// No payment signer, paid fallback, or application retry loop is installed.

// Download from the trusted seller origin: curl --fail "https://manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/assets/trial-client.js" -o trial-client.js
// existingSigner is your existing EVM EOA signer: address and signMessage({ message }).
// No deposit, payment signing, or private-key export is needed.
// Execution requires remaining credit, daily budget, and API availability.
import { fetchTrial } from "./trial-client.js";
const outcome = await fetchTrial({
    url: "https://manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/api/v1/content/url-to-markdown",
    network: "eip155:8453", quotedAmountAtomic: "6000",
    body: {
  "url": "https://example.com/article"
},
    signer: existingSigner,
  });
console.log(JSON.stringify(outcome.result, null, 2));
// A rejected promise stops this attempt. Do not automatically retry or pay.

Ready for continued use? Set up explicit paid API calls at the listed price. This quickstart never falls back to payment.

Continue with paid API calls

$0.006 per request, paid in USDC on Base. Use the same API URL and JSON body. Payment is an explicit choice in your own client; this page never pays.

1. Prepare your existing EVM payment signer with USDC on the network above.
2. Install @x402/fetch and @x402/evm in your Node.js ES module project.
3. Review the price cap below and replace the example body with your input before running.

// Explicit paid usage. existingPaymentSigner must support address and signTypedData.
// It must hold USDC on the configured network. This code authorizes a payment.
import { wrapFetchWithPaymentFromConfig } from "@x402/fetch";
import { ExactEvmScheme } from "@x402/evm/exact/client";

const paidFetch = wrapFetchWithPaymentFromConfig(fetch, {
  schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(existingPaymentSigner) }],
  paymentRequirementsSelector(version, accepts) {
    const quote = version === 2 && accepts.find((item) =>
      item.scheme === "exact" && item.network === "eip155:8453" &&
      item.asset.toLowerCase() === "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913" &&
      item.payTo.toLowerCase() === "0x9cd3f0d8a73a9a87f752f09d220652dc7de398cc" &&
      /^[0-9]+$/.test(item.amount) && BigInt(item.amount) > 0n &&
      BigInt(item.amount) <= 6000n);
    if (!quote) throw new Error("No payment quote within the displayed price and network.");
    return quote;
  },
});
const response = await paidFetch("https://manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/api/v1/content/url-to-markdown", {
  method: "POST", redirect: "error",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "url": "https://example.com/article"
}),
});
if (!response.ok) throw new Error(`Request failed: ${response.status}. Inspect before retrying.`);
console.log(await response.json());

Keep your application's spending limits in place for repeated calls. After an uncertain trial result, resolve its status before issuing another request.

Inspect access requirements (returns 402)

POST /api/v1/content/url-to-markdown

Send the documented JSON body. Invalid input is rejected before payment or upstream execution. An empty request does not execute the API.

This curl example only inspects access requirements. It sends no payment or wallet proof and does not return a business result. HTTP 402 is expected. Use the trial-only quickstart above to request a result without paying. A paid call requires an explicit x402 payment using a compatible client.

Replace sample inputs with your data. Encoded file samples illustrate the JSON format and may not be complete usable files.

curl --request 'POST' 'https://manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/api/v1/content/url-to-markdown' \
  --header 'Content-Type: application/json' \
  --data-raw '{
  "url": "https://example.com/article"
}'

Illustrative response · Not live data

This is a synthetic contract example, not a live result. Actual results depend on the submitted input and upstream availability.

{
  "requestedUrl": "https://example.com/article",
  "finalUrl": "https://example.com/article",
  "title": "Example",
  "byline": null,
  "excerpt": "Article text.",
  "markdown": "# Example\n\nArticle text.",
  "markdownCharacters": 24,
  "truncated": false,
  "retrievedAt": "2026-09-02T20:00:00.000Z"
}

Schemas & documentation

These schemas come from the same API descriptor used for validation and discovery. Read the complete OpenAPI contract for responses, errors, and access requirements.

{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "minLength": 1,
      "maxLength": 2048,
      "pattern": "^[hH][tT][tT][pP][sS]?://[^\\s]+$"
    }
  }
}

{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "requestedUrl": {
      "type": "string"
    },
    "finalUrl": {
      "type": "string"
    },
    "title": {
      "type": [
        "string",
        "null"
      ]
    },
    "byline": {
      "type": [
        "string",
        "null"
      ]
    },
    "excerpt": {
      "type": [
        "string",
        "null"
      ]
    },
    "markdown": {
      "type": "string"
    },
    "markdownCharacters": {
      "type": "integer",
      "minimum": 0
    },
    "truncated": {
      "type": "boolean"
    },
    "retrievedAt": {
      "type": "string"
    }
  },
  "required": [
    "requestedUrl",
    "finalUrl",
    "title",
    "byline",
    "excerpt",
    "markdown",
    "markdownCharacters",
    "truncated",
    "retrievedAt"
  ]
}