Discover / x402.freeq.one

x402-gateway

■ Challenge detected

MCP server for AI agents: 31 tools (blockchain data, web scraping, ZK proofs, image generation, gift cards) payable per call in USDC on Base via x402. Send JSON-RPC tools/call requests.

x402
Base
USDC
Other

Listed price: $0.001
Challenge detected: 6 of the last 10 checks
Median response: 155 ms
Last checked: 16 Oct, 18:49 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://x402.freeq.one/mcp
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

44 listed endpoints · on x402 Bazaar

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

Base URLhttps://x402.freeq.one

POST/tools/wallet_verify_nostr$0.002NIP-98 Nostr Auth Verifier: Verify a NIP-98 Nostr HTTP auth event. Returns the signer pubkey. Stateful replay protection: each event id can only be verified once. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/wallet_verify_nostr.
POST/tools/document_to_markdown$0.01Document to Markdown (auto-detect): Convert any document to Markdown with automatic format detection. One endpoint for pdf, docx, pptx, xlsx, csv, epub, html and plain text — provide a URL or base64 bytes and the type is detected from the file contents. Spreadsheets return both a Markdown table and a JSON array of rows. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/document_to_markdown.
POST/tools/webhook_catch$0.05Ephemeral webhook receiver. Creates a single-use HTTPS URL that catches any POST (Stripe, GitHub, internal) for 1 hour; senders pay nothing. Read captured events for $0.01 per read, extend for $0.05/hour. Response returns hook_url, read_url, extend_url, expires_at.
POST/mcp$0.001MCP server for AI agents: 31 tools (blockchain data, web scraping, ZK proofs, image generation, gift cards) payable per call in USDC on Base via x402. Send JSON-RPC tools/call requests.
POST/tools/giftcard/api/buy$1Buy a digital gift card and receive the code instantly. Payment settles on Base via x402.
POST/tools/keyword_volume$0.03Keyword Volume: Google search volume, CPC, and competition for up to 100 keywords. Priced below typical SEO-data APIs. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/keyword_volume.
POST/tools/pdf_to_markdown$0.01PDF to Markdown: Convert a PDF document to clean, LLM-ready Markdown. Provide a direct URL to the PDF or base64-encoded file bytes. Auto-extracts headings, paragraphs, lists and tables. Ideal for feeding reports, papers and contracts into RAG pipelines. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/pdf_to_markdown.
POST/tools/changelog_openapi$0.005OpenAPI Changelog Generator: Diff two OpenAPI specs and generate a structured breaking-change changelog (no LLM — deterministic diff). Provide base_spec_url and new_spec. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/changelog_openapi.
POST/tools/whale_alerts$0.002Whale Alerts Scanner: Scan recent blocks for large ETH transfers involving an address. Filter by direction (in/out/both) and threshold. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/whale_alerts.
POST/tools/markdown$0.002Markdown Extractor: Fetch a URL and convert its main content to clean, LLM-ready Markdown (strips nav/ads/sidebars). Options: output_format (markdown|text|json), css_selector, max_length, include_links, include_images. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/markdown.
POST/tools/domain_keywords$0.05Domain Keywords: Get all keywords a domain ranks for with position and volume. Priced below typical SEO-data APIs. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/domain_keywords.
POST/tools/photo_to_3d_fast$0.15Photo to 3D Model (fast): Photo to 3D model (fast tier, 10-30s). Upload a single 2D image URL, get a textured low-poly GLB mesh with a preview thumbnail. Game-ready — drop straight into Three.js, Unity, or Godot. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/photo_to_3d_fast.
POST/tools/xlsx_to_markdown$0.005XLSX/CSV to Markdown + JSON: Convert an XLSX spreadsheet or CSV to Markdown table AND a JSON array of row objects in one call. Provide a direct URL or base64-encoded file bytes. All sheets are included; multi-sheet workbooks are flattened in sheet order. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/xlsx_to_markdown.
POST/tools/pptx_to_markdown$0.005PPTX to Markdown: Convert a PPTX (PowerPoint) presentation to Markdown. Provide a direct URL or base64-encoded file bytes. Each slide becomes a heading with its text content — pitch decks and slide reports become LLM-readable text. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/pptx_to_markdown.
POST/tools/mermaid$0.005Mermaid Diagram Renderer: Render a Mermaid diagram to an image (PNG or SVG). Returns a base64-encoded image (MCP content type image). Options: format (png|svg), theme (default|dark|forest|neutral), scale (1-4, PNG only). Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/mermaid.
POST/tools/html_to_markdown$0.002HTML to Markdown Converter: Convert an HTML string to clean, LLM-ready Markdown. Handles headings, links, images, tables, lists and code blocks. Options: heading style (atx|setext), bullet list marker, code block style, emphasis delimiters. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/html_to_markdown.
POST/tools/verify_semaphore$0.002Semaphore ZK Proof Verifier: Verify a Semaphore ZK proof locally using Groth16 (embedded official vkey). No external dependency. Send the proof object from @semaphore-protocol/proof generateProof(). Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/verify_semaphore.
POST/tools/shortlink_create$0.002Short Link Creator: Create a permanent short link on freeq.one (e.g. https://freeq.one/MySlug). Optional: custom slug, expires_at (ISO date) for a TTL link that auto-expires — same price. Returns short_url plus a one-time manage_secret that gates FREE stats (GET /tools/shortlink_stats with X-Link-Secret) and FREE deletion of the link. Store the secret — it is shown only at creation. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/shortlink_create.
POST/tools/image_generate_quality$0.09Text to Image (premium): Generate a premium-quality image from a text prompt (10-30s, better prompt adherence and typography). Returns a permanent https URL to the hosted image on api.freeq.one/media/*. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/image_generate_quality.

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

Showing 19 of 44 listed endpoints. First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/x402.freeq.one

Recent checks

27 Sept 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 10 checks

When (UTC)	Result	HTTP	Response
16 Oct, 18:49 UTC	Challenge detected	402	265ms
15 Oct, 14:11 UTC	Challenge detected	402	214ms
14 Oct, 08:45 UTC	Challenge detected	402	131ms
13 Oct, 10:39 UTC	No challenge detected	200	115ms
11 Oct, 10:02 UTC	No challenge detected	200	133ms
9 Oct, 21:31 UTC	No challenge detected	200	191ms
8 Oct, 15:35 UTC	No challenge detected	200	134ms
7 Oct, 09:33 UTC	Challenge detected	402	116ms
6 Oct, 09:33 UTC	Challenge detected	402	179ms
27 Sept, 17:02 UTC	Challenge detected	402	107ms

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 x402-gateway?

Its listed price is $0.001.

What payment terms does x402-gateway advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is x402-gateway listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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