Canonical public x402 seller for Blinka: bounded stateless machine services, paid agent tools, and free procurement discovery. Same Blinka system across HTTP, MCP, and A2A protocol doorways; no private Mika state exposed.

Pay-per-call npm package health and maintenance-risk snapshot for agents. $0.003 USDC per call on Base via x402 v2. MCP discovery available.

Extract one public HTTPS webpage into bounded readable text, LLM-ready Markdown, title/description, headings and normalized links for RAG, research, summarization and agent workflows. x402 v2, $0.005 USDC on Base per successful extraction; invalid/failed extraction is not settled.

Batch-check 1-20 public HTTPS URLs for HTTP status, redirects, final URL, response time and key headers. Point-in-time verification for agents and developer workflows. x402 v2, $0.005 USDC on Base per successful request.

Public DNS record lookup over Google Public DNS-over-HTTPS for A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records.

Generate one cryptographically strong RFC 4122 UUID version 4. $0.001 USDC per call on Base via x402 v2.

Fast current npm package facts for coding agents: latest version, release freshness, weekly downloads and period, license, maintainer count, dependency counts, bundled types signal, engines, deprecation, repository and homepage. $0.003 USDC per call on Base via x402 v2.

Source-cited Devpost submission-compliance audits from public rules, GitHub, and deployment evidence. Failed validation and upstream model failures are not settled.

KGNINJA (GitHub KG-NINJA) x402 Agent API: POST /fix-error returns next-command + retry plan after $0.01 USDC Base settle. Related OSS Instant-Voice-to-MD https://github.com/KG-NINJA/Instant-Voice-to-MD. Catalog https://api.kgninja.dev

KGNINJA (GitHub KG-NINJA) scores shell commands before execution and returns a safety assessment. x402 HTTP API on Base at $0.01 USDC; related Instant-Voice-to-MD OSS. Use the /paid agent gate for web, on-chain, news, and X Brief supply.

Validate one JSON value against a bounded safe JSON Schema subset and receive path findings, hashes, and a signed MER.

Produce a bounded deterministic path-level diff between two JSON values with counts, truncation status, and a signed MER.

Canonicalize bounded JSON and return stable bytes, byte length, and a SHA-256 evidence hash with a signed MER.

26 pay-per-request agent tools for encoding, EVM wallet/token/NFT/transaction intelligence, gas, DNS, package security, x402 and OpenAPI QA.

Paid draw_winners. $0.08 + $0.0005/entry after 50, cap $2. Rewards Fuel.

Checks whether an x402-paywalled API responds correctly to the protocol (free /lint). Paid /deep-lint (0.03 USDC) gives a full compliance report. Paid /conform (0.05 USDC) runs live adversarial probes (garbage payment headers, fake tx hashes, replayed rejects) against any paid x402 endpoint to catch fail-open bugs that accidentally give the product away for free.

No-payment CLI and GitHub Action that reviews x402 manifests, OpenAPI specs, HTTP 402 challenges, browser CORS/payment-header behavior, cache policy, resource binding, and price/rail drift before launch. ([npm](https://www.npmjs.com/package/x402-surface-check)) ([Action](https://github.com/marketplace/actions/x402-surface-check))

MCP server for no-payment x402 launch-surface triage, 402 Index health checks, and paid-review handoff. Tools: `triage_x402_surface`, `watch_402_index`, and `x402_paid_paths`. ([npm](https://www.npmjs.com/package/x402-triage-mcp)) ([MCP Registry](https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.TateLyman%2Fx402-triage-mcp))

Seven production x402 decision APIs for GitHub due diligence, agent skill and instruction audits, CI diagnosis, and MCP compatibility, with Base USDC payments, free samples, OpenAPI, and installable skills.

x402 micropayment price data and discovery. 10 endpoints for querying x402 service pricing, availability, and network stats. $0.01 USDC per call on Base.

Checks llms.txt validity, AI-crawler robots.txt access, and OG/meta tag completeness in one report for a site. Free /check (summary score + one example issue per category). Paid /report 2 USDC one-time via x402/USDC on Base — every finding across all three checks, with fixes.

Pre-launch readiness audit bundling HTTP security headers, email anti-spoofing (SPF/DKIM/DMARC) and CORS config into one check. Free /check (score + one example issue per category) plus a free embeddable checked badge. Paid /report 2.99 USDC one-time via x402/USDC on Base — every finding, all three checks, prioritized fix list.

One accepted broken production path. Guarded 12-hour service window begins after cleared payment, accepted scope, reproducible failure, and agreed access. Verified fix or actionable root-cause package, otherwise refund under published terms.

Fresh isolated static validation and signed evidence for one exact public Agent Skill commit.

Deterministic read-only audit of a public x402 v2 GET endpoint: protocol, payment binding, Base USDC, Bazaar discovery, leakage checks, remediations, and SHA-256 report integrity.

A $5 Base-USDC website release audit: one bounded public HTTPS GET, 22 deterministic transport, security-header, technical SEO, and accessibility-surface checks, weighted score, observed evidence, copy-paste fixes, dossier ID, and SHA-256 report integrity.

Probe any x402 endpoint from the buyer side: unpaid request, decode the 402 challenge (payTo, price, scheme, x402 version) and get a verdict: sellable / no_gate / plain_402 / error. Never pays. 0.005 USDC per check via x402 on Base.

A test server for x402 clients and agents: the payment IS the scenario under test. /402/pay/base is one real, settling x402 paywall (0.01 USDC on Base, ?amount= 0.001-1.00; v2 PAYMENT-REQUIRED header and a spec-valid v1 body in the same 402) that returns a 200 with a PAYMENT-RESPONSE receipt and the transaction hash, and nothing else of value. Every other route under /402/ is a paywall that misbehaves on purpose and never settles. Around it: a free, no-signup catalogue of ~150 documented HTTP edge cases (content codings, ranges, conditional requests, cookies, auth challenges, SSE, cross-host redirects) as NDJSON at /corpus.jsonl, and dated observations of how eight real HTTP clients handle them at /clients.jsonl. No MCP server. Stateless; nothing stored about callers; CC0 output, MIT source; costs and revenue published and chain-reconciled at /books.

Deterministic npm registry evidence for coding agents: dependency maps, integrity, provenance, factual metadata flags, and stable digests.

KGNINJA (GitHub KG-NINJA) deterministic JSON verification with Ed25519-signed evidence after $0.01 USDC Base x402 settle. Related OSS Instant-Voice-to-MD https://github.com/KG-NINJA/Instant-Voice-to-MD. Catalog https://agent-economy.kgninja.dev. Supply gate https://x402-kg-receiver.interesting-peripheral.workers.dev/paid

Verified status of AI-agent bounty and task marketplaces: which ones are functioning, saturated, stale, empty, spam, capital-gated or closed. Structured JSON plus free MCP endpoint for agents doing cash-hunting or bounty discovery.

POST JSON with before and after OpenAPI 3.0/3.1 documents to receive structural request-contract changes: removed operations, newly required inputs, narrowed enums, tighter bounds and changed security. Reports evidence locations and explicit limits. No external references are fetched; send public schemas only. Price 0.01 canonical USDC on Base, paid directly to the service wallet. Checkout is available only while the settlement operator is active; check the origin health and manifest first. OpenAPI and a free demonstration are linked from the origin.

cron — Natural language 'every 5 minutes'/'daily at 3pm' or 5-field '*/5 * * * *

Run one cross-contract release preflight across MCP tools, OpenAPI breakages, GraphQL, SDK exports and schema drift — machine-readable SAFE/REVIEW/BLOCK verdict.

Metered HTML→structured JSON agent API. Free demo POST /v1/demo/html-to-json. Paid POST /v1/html-to-json ($0.02) and /v1/fetch-to-json ($0.05) return HTTP 402 with x402 accepts + Base USDC prepaid credits. MCP at /mcp. Manifest /.well-known/x402. Contact [email protected]

Generate a deployment-ready agent-commerce bundle for an existing public service: x402 readiness evidence, agent card, llms.txt, OpenAPI/x402 metadata, marketplace payloads and a prioritized launch checklist. $99 USDC per call.

One-call go-live for an already-public paid agent service: verify x402 readiness, generate deployment artifacts, register with compatible buyer discovery markets, and return receipts. $350 USDC per call.

Statically validate x402 v2 payment declarations for protocol shape, Base network, amount, asset, recipient, timeout, and duplicate accepts. Live endpoint; $0.05 USDC per request on Base.

Statically validate x402 v2 payment declarations for protocol shape, Base network, amount, asset, recipient, timeout, and duplicate accepts. Live endpoint; $0.05 USDC per request on Base.

One-time offline browser workshop for up to 1,000 CSV, TSV, JSON, pasted, or manual rows: SVG/PNG QR assets, normalized campaign JSON, per-file SHA-256 manifest, and self-contained A4 print HTML. No upload, telemetry, hosted redirect, scan analytics, or subscription.

Inspect a public HTTPS or x402 endpoint before calling or paying it. Returns reachability, latency, HTTP 402 behaviour, payment network, asset, payee, quoted Base USDC price and a deterministic verdict.

Audits a public OpenAPI contract, flags schema and security issues, and returns a safe pytest evidence pack. Settles 15 USDC directly to the provider wallet on Base mainnet via x402.

Micro-offer: full ship-small-feature Cursor/Grok skill markdown for $0.25 USDC on Base via x402. Free sample at /v1/sample-skill; full pack $1 at /v1/agent-ops-pack. Contact [email protected]

Cursor/Grok Bot skills + routines pack (pr-babysit, incident-postmortem, dependency-upgrade-safety, ship-small-feature, morning eng digest, CI-failed alert). Pay >=$1 USDC on Base via x402 (or send USDC then GET ...?tx=0xHASH). SFW / engineering only. Free card: GET / and GET /health. Fallback: email tx hash to [email protected].

Three checks on OpenAPI or Swagger JSON in required ?q=: a version field, at least one path, and one 2xx response. Returns a score and the issues. Not a full linter, not a schema validator, and not an x402scan audit. $0.001 USDC. The hour pass covers it.

A compact scan of a log or webhook sample. Send the text as ?raw= or as base64 JSON in the header X-Aizamon-Payload. Returns a failure class, counts of sensitive-looking strings, and a next action. $0.49 USDC. Not a penetration test and not a full audit. The sample is not stored as a report.

Repairs broken JSON in required ?q=. Handles markdown fences, comments, trailing commas, single quotes, unquoted keys, and Python True, False, and None. Returns ok, the repaired text, the changes, and the value. A comma inside a string stays. Text that is still not JSON comes back ok false with no invented field. $0.001 USDC. The hour pass covers it.

AI agents buying real-time insights.

Autonomous AI code review service accepting x402 micropayments (USDC on Base). Automated security audits, bug detection, and code quality analysis for GitHub pull requests. ([Docs](https://x402-code-review.x402-cr.workers.dev/.well-known/x402.json))

Paid get_opportunities MCP. ~$0.10 USDC per call. Rewards Fuel.

Cheapest settle-path test on the PXke Algorand-mainnet x402 marketplace ($0.001) -- also see the full marketplace: endpoint directory, visibility board, feature-request board, and endpoint grading, all at https://algorand-api.pxke.me/api/v1/x402

Requests ranked by paid demand, vote totals included; ?limit=.

List one x402 endpoint in the public directory for 30 days (JSON body: url, price, description, assets, tags, category, schema, reimburses, contact). `reimburses` and `contact` are optional, self-declared and unverified for third-party listings.

Place one link, name and pitch on the public board for 14 days (JSON body).

Reachability check of a caller-supplied URL from our servers: HTTP status, response time, redirect chain and resolved IP. Never downloads the response body, never forwards caller-supplied headers to the target. A 'down' result is a normal, fully-charged answer, same as 'up'.

Paid deterministic JSON data-quality report for AI agents: missing values, duplicate rows, inconsistent types, and schema findings. Pay per call with USDC on Base via x402.