X402 Protocol Integration services

Payable x402 protocol integration endpoints for agents, ranked by measured reliability.

api.axongate.one

api.axongate.one

80
score

Manages access permissions or tokens for X.402 protocol-based services.

USDC Base

www.tip.md

www.tip.md

79
score

tip.md - Send USDC tips on base via x402 payment protocol with CDP disbursement

USDC Base

web-production-8136ee.up.railway.app

web-production-8136ee.up.railway.app

78
score

Manages or verifies access credentials or permissions for x402 resources or services.

USDC Base

paygent.obsmetrics.com

paygent.obsmetrics.com

78
score

Leaked-credential guardrail for agents: submit a blob you are about to commit, log, post, or hand to another tool (a diff, a config, an .env, an LLM output) and get a machine-enforceable verdict - does it contain a live secret? Detects cloud keys (AWS), VCS tokens (GitHub/GitLab), provider API keys (Stripe, OpenAI, Anthropic, Google, Slack), private-key blocks, JWTs, and credentials embedded in URLs, plus high-entropy key=value assignments. Returns a risk level, the detected classes with a MASKED locator (never the secret itself, so the verdict cannot re-leak), and a REDACTED copy safe to emit onward. Deterministic, sub-second, never fetches. Detection of known secret formats - not a proof of cleanliness.

USDC Base

x402.sniperx.fun

x402.sniperx.fun

76
score

Health check endpoint for x402 payment flow testing

USDC Solana

agent402.tools

agent402.tools

75
score

OpenAI-compatible chat completions priced from the request itself: the 402 quotes this exact body, from $0.001, and a buyer on the upto scheme settles the tokens actually used under that quote. Use it when an agent sends large or variable prompts and wants to pay for what it sends, not a flat tier.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

x402.clashofcoins.com

x402.clashofcoins.com

74
score

Low-cost gateway health probe for real x402 settlement checks

USDC Base

agent402.tools

agent402.tools

70
score

Rerank documents against a query over x402 - the Cohere /rerank wire ({query, documents[], top_n} -> results with relevance_score), served by cohere/rerank-v3.5, $0.002 per call in USDC, no API key, no signup. Up to 50 documents (1,600 chars each, 40k total) and a 500-char query per call. Deterministic, so a byte-identical repeat within 10 minutes is served FREE from cache (X-Cache: hit; opt out with cache:false).

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

agent402.tools

agent402.tools

70
score

OpenAI-compatible text embeddings (text-embedding-3-small by default; 3-large and ada-002 supported), up to 64 inputs or 16k chars per call, returned in the standard OpenAI shape. Identical inputs repeated within 10 minutes are served free from cache. Use it for semantic search, clustering and retrieval from any OpenAI SDK by changing base_url.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

x402lifeadvice.vercel.app

x402lifeadvice.vercel.app

69
score

Get one piece of thoughtful life advice, paid per request over x402.

USDC Base

ladyfortunalx402.vercel.app

ladyfortunalx402.vercel.app

69
score

Get a random fortune via x402 payment on Base mainnet.

USDC Base

x402.ottoai.services

x402.ottoai.services

68
score

Otto X402 Router — Meta Intelligence. Ask what data/service you need; get the best Otto-verified plus live CDP Bazaar x402 candidates with prices, pay_urls and blunt source labels. Non-custodial discovery.

USDC BaseSolana

agent402.tools

agent402.tools

68
score

Anthropic Messages API over x402 - point the Anthropic SDK (or Claude Code / the Agent SDK) at base_url https://agent402.tools/v1 and pay $0.02 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Messages wire (Claude natively, others translated). Depth: `effort` (low..max) on Claude 4.7+, thinking.budget_tokens on older Claude. Up to 32,000 input chars and 2048 output tokens; streaming supported.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

agent402.tools

agent402.tools

67
score

OpenAI Responses API over x402 - point the OpenAI SDK's responses.create() (or the OpenAI Agents SDK) at base_url https://agent402.tools/v1 and pay $0.02 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Responses wire.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

agent402.tools

agent402.tools

67
score

OpenAI-compatible chat completions paid per call in USDC: point any OpenAI SDK at this base URL and send a normal chat request, with the model chosen from a curated list and streaming supported. Use it when an agent needs a model answer without an API key or an account, one call at a time, with a receipt for each.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

x402.twit.sh/users/by/id

x402.twit.sh

67
score

Look up a single Twitter/X tweet by its numeric tweet ID. Returns full tweet data including text, author profile, creation date, engagement metrics (likes, retweets, replies, quotes, bookmarks), and referenced tweets. Query param: id (string, required) - numeric tweet ID, e.g. GET /tweets/by/id?id=1110302988. Returns X v2 API-compatible JSON.

BTCUSDC BaseLightning

agent402.tools

agent402.tools

67
score

Anthropic Messages API over x402 - point the Anthropic SDK (or Claude Code / the Agent SDK) at base_url https://agent402.tools/v1/nano and pay $0.003 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Messages wire (Claude natively, others translated). Depth: `effort` (low..max) on Claude 4.7+, thinking.budget_tokens on older Claude. Up to 12,000 input chars and 768 output tokens; streaming supported.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

agent402.tools

agent402.tools

67
score

OpenAI Responses API over x402 - point the OpenAI SDK's responses.create() (or the OpenAI Agents SDK) at base_url https://agent402.tools/v1/nano and pay $0.003 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Responses wire.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

api.xfuel.app

api.xfuel.app

67
score

OpenAI-compatible paid inference via x402 USDC on Base and Solana ($0.01). POST /v1/chat/completions is the recommended surface. Returns signed receipt + public verify_url. Paying this host is real mainnet USDC.

USDC BaseSolana

agent402.tools

agent402.tools

67
score

OpenAI Responses API over x402 - point the OpenAI SDK's responses.create() (or the OpenAI Agents SDK) at base_url https://agent402.tools/v1/auto and pay $0.01 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Responses wire.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

x402-factory.com

x402-factory.com

67
score

Cheapest endpoint: liveness plus x402 payment pipeline check — Returns ok with the server time and whether this call was paid. Use it to verify your x402 client end to end before spending on data endpoints.

USDC Base

agent402.tools

agent402.tools

66
score

Anthropic Messages API over x402 - point the Anthropic SDK (or Claude Code / the Agent SDK) at base_url https://agent402.tools/v1/auto and pay $0.01 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Messages wire (Claude natively, others translated). Depth: `effort` (low..max) on Claude 4.7+, thinking.budget_tokens on older Claude. Up to 16,000 input chars and 1024 output tokens; streaming supported.

USDC algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=ArbitrumBaseoptimismOther EVMPolygonSolanastellar:pubnet

api.oblique.markets

api.oblique.markets

66
score

Use when an agent needs bazaar price stats. Returns x402 Bazaar price distribution across the latest daily full-catalogue snapshot: min/p25/p50/p75/p90/max in atomic units and USD, USD price bands with shares, and per-network listing counts with median price. Optional ?network= filter. $0.002.

USDC BaseSolana

oblique.markets

oblique.markets

66
score

Live x402 Bazaar market pulse: trending services, call volumes, new listings, and catalog changes from daily full-catalog snapshots. Machine-readable JSON for agent-market research

USDC BaseSolana