Xynaptic.io alternatives

15 x402 marketplaces & API directories compared with Xynaptic.io: the price per call read from each 402, x402 grade, uptime and median response time from our own daily unpaid checks.

Xynaptic.io for reference

More than 200 pay-per-call data APIs for agents (official registries, market data, energy, flights, dev tools), paid in USDC over x402 on Base, Polygon or…

Up · x402 grade A (100/100) · 100% up (14/14 checks) · $0.01 per call in its 402 · 207 ms median

Xynaptic.io review · Is Xynaptic.io down?

Top ranked

Station f(x)

Grade A (95/100), up

Lowest price per call in its 402

Macaroon Network

$0.001, below Xynaptic.io's $0.01

Fastest median response

x402scan

238 ms (Xynaptic.io: 207 ms)

15 Xynaptic.io alternatives compared

Ranked by x402 grade, then uptime from our daily checks, then x402 score and response time. Price is shown but never used for ranking; “lower” or “higher” compares with Xynaptic.io’s $0.01 per call. Paid placement never changes the order.

#	Listing and why pick it	Status	x402 grade	Uptime (checks so far)	Price in 402	Response (median)
1	Station f(x)status Lower price per call ($0.005 vs $0.01) Function marketplace for agents (economic data, product intelligence, coordination tools), paid per call on…	Up	A (95/100)	100% (14/14)	$0.005 (lower)	263 ms
2	Agent402 status Lower price per call ($0.005 vs $0.01); also pays on Arbitrum and Avalanche Catalog of 500+ pay-per-call tools, models and reports for agents over x402 or MPP, or by card.	Up	A (95/100)	100% (14/14)	$0.005 (lower)	268 ms
3	Mekler AI status Lower price per call ($0.003 vs $0.01) Practical services an AI assistant can call, such as checking a CSV file, finding research or receiving email.	Up	A (95/100)	100% (14/14)	$0.003 (lower)	380 ms
4	Teardrop status Grade A, 100% up so far, $0.01 per call; no measured edge over Xynaptic.io Tool marketplace where agents pick tools by observed reputation and pay per call in USDC on Base over MCP or…	Up	A (95/100)	100% (14/14)	$0.01	437 ms
5	Grokzilla status Grade A, 100% up so far, $0.01 per call; no measured edge over Xynaptic.io About 32 pay-per-call JSON APIs for agents, paid in USDC on Base over x402 v2 with no account.	Up	A (90/100)	100% (14/14)	$0.01	253 ms
6	MicroTap status Also pays on Arbitrum About 20 x402 APIs for agents (crypto and DeFi data, prediction markets, weather, web search), paid per call…	Up	A (90/100)	100% (14/14)	$0.01	319 ms
7	Ausca status Grade A, 100% up so far, $0.05 per call; no measured edge over Xynaptic.io Metered APIs and MCP services agents can buy without accounts, with fixed prices and verifiable receipts.	Up	A (90/100)	100% (14/14)	$0.05 (higher)	344 ms
8	Toll402 status Lower price per call ($0.002 vs $0.01) Gateway that puts thousands of agent tools behind one endpoint (web reading, enrichment, SEO, market data…	Up	A (90/100)	100% (11/11)	$0.002 (lower)	376 ms
9	2s status Lower price per call ($0.009 vs $0.01) Large catalog of 575+ pay-per-call endpoints for agents: data, an AI gateway, storage, queues and watchers.	Up	B (85/100)	100% (14/14)	$0.009 (lower)	296 ms
10	CoinopAI status Lower price per call ($0.005 vs $0.01) Pay-per-call AI services on Base, including Kronos crypto data, image generation and a travel agent.	Up	B (85/100)	100% (14/14)	$0.005 (lower)	341 ms
11	Macaroon Network status Lower price per call ($0.001 vs $0.01) Marketplace where agents find and buy live data and scientific tools over x402 in USDC on Base.	Up	B (85/100)	100% (14/14)	$0.001 (lower)	362 ms
12	x402scan status Grade C, 100% up so far, $0.01 per call; no measured edge over Xynaptic.io Explorer for the x402 ecosystem showing transactions, sellers and paid resources.	Up	C (75/100)	100% (14/14)	$0.01	238 ms
13	AgentPay Directory Lower price per call ($0.001 vs $0.01) A directory where AI agents and the people behind them list machine-payable endpoints and real-world…	Up	F (45/100)	100% (14/14)	$0.001 (lower)	413 ms
14	agentsvc.io status Lower price per call ($0.0065 vs $0.01); also pays on Arbitrum About 127 per-call web services for agents, including crawling to Markdown, extraction, screenshots, PDF and…	Up	A (100/100)	100% (14/14)	$0.0065 (lower)	582 ms
15	HALOWERK status Lower price per call ($0.003 vs $0.01) Paid endpoints that agents call per request over x402 on Base, with no account or API key.	Up	A (100/100)	100% (14/14)	$0.003 (lower)	656 ms

1. Station f(x)Up
Lower price per call ($0.005 vs $0.01)
x402 grade
A (95/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.005 (lower)
Response
263 ms
Station f(x) status
2. Agent402Up
Lower price per call ($0.005 vs $0.01); also pays on Arbitrum and Avalanche
x402 grade
A (95/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.005 (lower)
Response
268 ms
Agent402 status
3. Mekler AIUp
Lower price per call ($0.003 vs $0.01)
x402 grade
A (95/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.003 (lower)
Response
380 ms
Mekler AI status
4. TeardropUp
Grade A, 100% up so far, $0.01 per call; no measured edge over Xynaptic.io
x402 grade
A (95/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.01
Response
437 ms
Teardrop status
5. GrokzillaUp
Grade A, 100% up so far, $0.01 per call; no measured edge over Xynaptic.io
x402 grade
A (90/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.01
Response
253 ms
Grokzilla status
6. MicroTapUp
Also pays on Arbitrum
x402 grade
A (90/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.01
Response
319 ms
MicroTap status
7. AuscaUp
Grade A, 100% up so far, $0.05 per call; no measured edge over Xynaptic.io
x402 grade
A (90/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.05 (higher)
Response
344 ms
Ausca status
8. Toll402Up
Lower price per call ($0.002 vs $0.01)
x402 grade
A (90/100)
Uptime (checks so far)
100% (11/11)
Price in 402
$0.002 (lower)
Response
376 ms
Toll402 status
9. 2sUp
Lower price per call ($0.009 vs $0.01)
x402 grade
B (85/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.009 (lower)
Response
296 ms
2s status
10. CoinopAIUp
Lower price per call ($0.005 vs $0.01)
x402 grade
B (85/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.005 (lower)
Response
341 ms
CoinopAI status
11. Macaroon NetworkUp
Lower price per call ($0.001 vs $0.01)
x402 grade
B (85/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.001 (lower)
Response
362 ms
Macaroon Network status
12. x402scanUp
Grade C, 100% up so far, $0.01 per call; no measured edge over Xynaptic.io
x402 grade
C (75/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.01
Response
238 ms
x402scan status
13. AgentPay DirectoryUp
Lower price per call ($0.001 vs $0.01)
x402 grade
F (45/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.001 (lower)
Response
413 ms
14. agentsvc.ioUp
Lower price per call ($0.0065 vs $0.01); also pays on Arbitrum
x402 grade
A (100/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.0065 (lower)
Response
582 ms
agentsvc.io status
15. HALOWERKUp
Lower price per call ($0.003 vs $0.01)
x402 grade
A (100/100)
Uptime (checks so far)
100% (14/14)
Price in 402
$0.003 (lower)
Response
656 ms
HALOWERK status

Prices are what each endpoint’s 402 asked for at our last check, for the one endpoint we check. Each API does its own job and other routes may be priced differently, so a lower price is not like-for-like. Check the provider before paying.

Xynaptic.io alternatives FAQ

What are the best alternatives to Xynaptic.io?

By our ranking (x402 grade, then uptime from our daily checks, then x402 score and response time): Station f(x), Agent402, Mekler AI. Each does its own job, so check that its endpoints cover what you use Xynaptic.io for.

Is there a cheaper alternative to Xynaptic.io?

10 of the 15 alternatives asked for less per call than Xynaptic.io's $0.01 in their 402 at our last check: Station f(x) ($0.005), Agent402 ($0.005), Mekler AI ($0.003), Toll402 ($0.002), 2s ($0.009) and others. Prices are for the endpoint we check; other routes and what you get per call differ, so check the provider before paying.

How are these alternatives ranked?

Same category, ranked by x402 grade, then uptime from our own daily unpaid checks, then x402 score, valid x402 share and median response time. Price is shown but never used for ranking, and paid placement never changes the order.

Xynaptic.io review·Xynaptic.io status·marketplaces & API directories status·Best marketplaces & API directories·Uptime leaderboard

Data as of Nov 10, 2026, 7:21 AM ET. One unpaid request per listing per day to its example endpoint; up means any answer below HTTP 500 except 404/410 within 8 seconds. The x402 grade comes from x402fix, our free unpaid check of each 402 payment request; it rates the payment request, not uptime, and is not an endorsement. Listings with no check yet, no price read from a 402, or a check we are fixing are left out.

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