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Changelog
Recent additions to Agent402: new tools, skill packs, framework adapters, and platform features.
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2026-07-24
MPP dual-stack - every endpoint speaks two payment protocols
- Every paid endpoint now answers MPP (Machine Payments Protocol, the IETF-track Payment HTTP auth scheme) alongside x402, from the same URL at the same price
- 402 responses carry a WWW-Authenticate: Payment challenge (EIP-3009 USDC on Base and Celo); Authorization: Payment credentials settle identically to x402; settled responses return a signed Payment-Receipt
- Proven live daily: the paid canary buys over the native MPP wire on Base and Celo, receipts on-chain
- Listed on MPPScan; /openapi.json now serves MPP discovery metadata (per-operation offers + service info)
- MPP adoption is public: toolCallsServed.viaMPPWire at /api/stats
- HEAD requests on paid routes now return the same 402 challenges as GET
- Explainer: what-is-x402 now covers how x402 and MPP compare
2026-07-23
Smart Order Router - Algorand external settlement
- POST /api/route/execute now settles on the buyer's chain: Algorand buyers are routed to proven AVM sellers and pay in USDC on Algorand
- Algorand payment validity windows are checked before execution, so slower tools can't strand a payment
2026-07-21
Smart Order Router - external execution
- POST /api/route/execute ($0.01) can buy from external x402 sellers on the buyer's behalf: one payment in, result plus receipt out
- Only sellers with verified on-chain settlement history are eligible - unproven or unhealthy sellers are never routed to
2026-07-20
On-chain intelligence tools + Celo rail
- contract-inspect ($0.005) and address-profile ($0.005): verified contract source, ABI, and address token/transaction profiles across major EVM chains
- USDC on Celo joins the accepted settlement rails
2026-07-17
More settlement rails - USDG on Robinhood Chain, USDC on Avalanche
- USDG (Global Dollar) on Robinhood Chain accepted for every paid endpoint
- USDC on Avalanche accepted for every paid endpoint
- Every rail is exercised by a daily paid canary with real settlements
2026-07-16
Text-to-speech returns to the /v1 gateway
- /v1/audio/speech ($0.06): OpenAI TTS wire format, mp3/pcm output, 2k-character cap
- Served by a five-model failover chain - a provider outage never becomes the buyer's error
- OpenAI voice names map automatically; native voice ids listed on /v1/models
2026-06-24
LLM vision, structured output, and content moderation
- Vision: send up to 2 image URLs to any LLM tier - screenshot analysis, chart reading, image Q&A
- Structured output: response_format with json_object or json_schema for schema-enforced JSON
- Content moderation: /api/moderate ($0.002) - check text for harmful content across 13 categories
- All guardrails enforced server-side: image count limits, schema size caps, data: URI blocking
2026-06-24
Full AI suite - TTS, STT, embeddings via x402
- Text-to-speech: /api/tts ($0.05) and /api/tts-hd ($0.10) - 10 voices, 6 audio formats
- Speech-to-text: /api/transcribe ($0.03) and /api/transcribe-pro ($0.10) - URL-based audio input
- Embeddings: /api/embed ($0.005) and /api/embed-large ($0.01) - 1536 or 3072 dimensions for RAG and search
- No API key needed - pay per call with USDC on Base, Solana, Polygon & Arbitrum
- Self-hosters: bring your own upstream key to run these for free
2026-06-24
Code execution sandbox - Python/JS via x402
- Run Python or JavaScript in isolated cloud sandboxes: /api/code-run ($0.02) and /api/code-run-pro ($0.05)
- Returns stdout, stderr, expression result, and error traceback
- Pro tier: 60s timeout and 50k char code limit for longer computations
- Each call runs in a fresh, isolated VM - nothing persists between calls
2026-06-24
Image generation gateway - 3-tier GPT Image via x402
- Generate images: /api/image-gen ($0.03), /api/image-gen-hd ($0.10), /api/image-gen-premium ($0.30)
- Text-to-image - no API key needed, pay per call, returns base64 PNG
- Three quality tiers from fast drafts to high-fidelity output
2026-06-24
LLM proxy gateway - 3-tier inference via x402
- Chat completions: /api/llm ($0.01), /api/llm-pro ($0.10), /api/llm-premium ($0.50)
- OpenAI-format interface - no API key needed, pay per call
- Models: GPT-4o-mini, GPT-4o, GPT-4.1, o3, o3-mini
2026-06-23
Reliability improvements and observability
- Per-tool analytics: every call now tracked with latency, cache, and error metrics
- Improved upstream reliability for finance and government data tools
- Automatic retry on transient network failures for market data endpoints
2026-06-23
Developer experience and SEO improvements
- Proper caching headers on static and discovery routes for faster loads
- /health endpoint now reports tool count, uptime, and mode
- Expanded sitemap with blog posts, adapter docs, and webhook pages
- Wiki and docs navigation updated with new developer resources
2026-06-23
Crypto-hash, string, and calendar kits - 15 new tools
- Crypto-hash kit: PBKDF2, scrypt, HKDF, constant-time compare, CRC32/Adler32 checksums
- String kit: Jaccard similarity, case conversion, fuzzy matching, character frequency, word wrap
- Calendar kit: ISO week numbers, leap year check, Easter date, epoch conversion, day-of-year
- Google ADK adapter published - agent402-google-adk on npm
2026-06-22
Validation, encoding, and math kits - 15 new tools
- Validation kit: phone formatting, XML validation, CSV linting, base detection, IPv6 expansion
- Encoding kit: Punycode, NATO phonetic, Soundex, binary-text, Braille conversion
- Math kit: Roman numerals, Fibonacci, primality check, GCD/LCM, number base conversion
2026-06-21
Decode-blob and trend-analysis skill packs
- decode-blob skill pack - automatically detect and decode JWT, gzip, brotli, base64, or hex blobs
- trend-analysis skill pack - fetch data, summarize, smooth, detect trends, flag anomalies, benchmark
- Compression kit: 5 tools for gzip, brotli, and deflate compression/decompression
- Stats kit: 5 tools for summary statistics, correlation, regression, moving averages, and outlier detection
2026-06-20
Security-audit and structured-scrape skill packs
- security-audit skill pack - 7-tool domain audit covering DNS, TLS, WHOIS, HTTP, headers, SPF, and robots.txt
- structured-scrape skill pack - render a page and extract structured data in one workflow
- HTML kit: 5 tools for extracting text, elements, links, tables, and headings from HTML
2026-06-19
x402 economy dashboard and leaderboard
- /economy - daily x402 ecosystem volume, concentration, and network breakdown
- /leaderboard - public on-chain ranking of x402 sellers by Base USDC settled volume
- /api/leaderboard - machine-readable seller rankings
- Smart Order Router (/api/route) - find the cheapest healthy tool across the x402 ecosystem
2026-06-18
Docs hub, analytics dashboard, and caching
- /docs - wiki content rendered on-site with sidebar navigation
- /analytics - live tool-level call counts, error rates, and latency percentiles
- Server-side response caching with cache-hit headers for supported routes
- Idempotency support - Idempotency-Key header prevents double-charging on retries
2026-06-17
Tollbooth Cloud and framework adapters
- Tollbooth Cloud - hosted multi-site pay-per-crawl dashboard
- 8 framework adapters on npm: OpenAI, Anthropic, Vercel AI SDK, LangChain, LlamaIndex, Google ADK, OpenAI Agents, AWS Strands
- agent402-client SDK - find() + call() with auto-payment