Name: x402 Paid-API Starter Kit
Brand: Avasis
Price: 49 USDC
Availability: InStock

01 / What you get

One zip, the whole stack

01
The server. server.mjs, handler.mjs and lib/: facilitators, a store and a fake facilitator for offline tests. Plus smoke.mjs and a contract test.
02
The contract. CONTRACT.md and LAUNCH_CHECKLIST.md: never charged on failure, the body released only after settlement, idempotent recovery.
03
The deploy. A Caddyfile example, a systemd unit and DEPLOY.md.
04
The listings. Example 402 bodies (v1 and v2), a Bazaar discovery extension, llms.txt, openapi.json and /.well-known/x402, plus DIRECTORIES.md.

AVASIS.KIT·ZIP / CONTENTS25 files

x402-paid-api-starter-kit.zip59,057 B · 25 files

deploy3
- Caddyfile.example
- DEPLOY.md
- your-api.service
listings7
- 402-body.v1-compatible.example.json
- 402-payment-required.v2.decoded.example.json
- DIRECTORIES.md
- bazaar-discovery-extension.example.json
- llms.example.txt
- openapi.example.json
- well-known-x402.example.json
server11
- lib
  - facilitators.mjs
  - fake-facilitator.mjs
  - store.mjs
- test
  - contract.test.mjs
- .env.example
- .gitignore
- handler.mjs
- package-lock.json
- package.json
- server.mjs
- smoke.mjs
CONTRACT.md
LAUNCH_CHECKLIST.md
LICENSE.txt
README.md

sha256 ab5cfc51fba8c9ca877108b4b8a384b9eb095643eb5fcadd6e982d7c172fc477

02 / How to buy

Your agent buys it in one call

Default x402 clients stop at $1, so the one step buyers miss is the limit. Set it to $49.00, fund the agent and repeat the GET.

AVASIS.AGENTS / QUESTS Starter kit

x402 Paid-API Starter Kit

Ship a pay-per-call agent endpoint in an afternoon.

Avasis$49.00 one-time · USDC on Base

Research + Rails Retainer (1 month)

Research and rails tuning for teams selling to agents.

Avasis$999.00 / month · USDC on Base

White-Label x402 Rails Pack

Our production paid-API rails, under your brand and payTo.

Avasis$2,500.00 one-time · USDC on Base

Prepaid API credit

One payment, many calls. Failed calls are never debited.

Avasisfrom $1.00 · USDC on Base

payx402USDC on Base (eip155:8453)Free /info ↗

payx402USDC on Base (eip155:8453)Free /v1/meter ↗

01
Pick an offer
Catalog

Offer$49Starter KitOne-time$999Retainer30 days$2,500White-labelCustom scope$1+Prepaid creditUp to +30%

02
Raise payment limit
Limit
per-payment limit ≥ $49.00

Default x402 clients stop at $1, so a $49.00 quote is refused before it is signed. Set the limit first.
```
client.setSpendControls({ maxAmountPerPayment: "$49" })
```
03
Fund your agent
USDC

$49.00exact · USDC on Baseone payment

Send USDC on Base to your agent's wallet. The facilitator pays gas, so it needs no ETH. Meter credit can't buy the kit.
04
Buy once
Buy
$49.00once · never charged on failure
- Never charged on failure: any 4xx/5xx is not settled; a failed settlement is a 402.
- The body is released only after settlement succeeds.
- Idempotent: re-send the identical signed request to get the same delivery free (recovered:true, charged_again:false).
Open /info ↗

02
Scope it
Intake

30 days from settlement; renew by paying again (each payment = one more month)

Rather pay by invoice or scope first? Email abhay@avasis.ai.

Email abhay@avasis.ai
03
Raise limit, fund the agent
USDC
per-payment limit ≥ $999.00
```
client.setSpendControls({ maxAmountPerPayment: "$999" })
```
$999.00exact · USDC on Baseone payment
04
Buy one month
Buy
$999.0030 days from settlement · renew by paying again
- The 200 body is a purchase receipt with a purchase token and a free status_url. Email the token to start.
- Never charged on failure: any 4xx/5xx is not settled; a failed settlement is a 402.
- Idempotent: identical signed request re-sent = same receipt free.
Open /info ↗

02
Scope it
Intake

One-time; custom scope agreed at intake, delivered under your brand

Rather pay by invoice or scope first? Email abhay@avasis.ai.

Email abhay@avasis.ai
03
Raise limit, fund the agent
USDC
per-payment limit ≥ $2,500.00
```
client.setSpendControls({ maxAmountPerPayment: "$2500" })
```
$2,500.00exact · USDC on Baseone payment
04
Buy the pack
Buy
$2,500.00one-time · custom scope agreed at intake
- The 200 body carries the purchase receipt, the token, intake steps and the starter-kit code base zip.
- Never charged on failure: any 4xx/5xx is not settled; a failed settlement is a 402.
- Idempotent: identical signed request re-sent = same receipt free.
Open /info ↗

02
Pick a rail
Catalog

Metered railSolana token verdict $0.01Base tx precheck $0.02Solana rug check complete kit $0.02Base fee plan $0.002Returns all five chain tips in one call (Solana slot, priority fees, SOL/USD, Base gas, Ethereum gas) for dashboards, bots and multi-chain agents $0.0006Web page reader $0.002

Calls per daysizes the pack to the 30-day expiry
03
Add prepaid credit
USDC

Credit pack$1$1.10 credit · +10%fits the default $1 cap$5$6.00 credit · +20%opt in above the $1 client cap$20$26.00 credit · +30%opt in above the $1 client cap

600 verdicts · $0.01 each · 25 days at 24/day

Default x402 clients stop at $1. Set your client's per-payment limit (spendControls.maxAmountPerPayment) to at least $5.00 before paying.

Credit expires 30 days after the last top-up. Balance cap $200. Trying it first? Trial pack $0.05 → $0.06 credit
04
Run
Run
$0.01per call · debited only for 2xx/3xx answers
```
curl -H "Authorization: Bearer <token>" "https://agents.avasis.ai/v1/sol/token-verdict…"
```
- Debited only for 2xx/3xx answers; 4xx/5xx/aborted calls are refunded.
- Insufficient or expired balance falls back to the normal per-call x402 402.
- Expiry: 30 days after the last top-up. Balance cap: 200.000 USDC.
- Rate: 25 req/s per token (burst 50).

Quote

Amount: $49.00 · 49000000 atomic
Network: eip155:8453 · Base
Asset: USD Coin 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
payTo: 0x6264191D6dD5427435B5E829077842e130Ef1fc8
Scheme: exact · timeout 120 s
Status: ready · snapshot 2026-11-04

Before you sign

Default x402 clients stop at $1. Set your client's per-payment limit (spendControls.maxAmountPerPayment) to at least $49.00 before paying.
Verify the payTo against the live 402 quote, never against explorer history.

Files 25

CONTRACT.md
LAUNCH_CHECKLIST.md
LICENSE.txt
README.md
deploy/Caddyfile.example
deploy/DEPLOY.md
deploy/your-api.service
listings/402-body.v1-compatible.example.json
listings/402-payment-required.v2.decoded.example.json
listings/DIRECTORIES.md
listings/bazaar-discovery-extension.example.json
listings/llms.example.txt
listings/openapi.example.json
listings/well-known-x402.example.json
server/.env.example
server/.gitignore
server/handler.mjs
server/package-lock.json
server/package.json
server/server.mjs
server/smoke.mjs
server/lib/facilitators.mjs
server/lib/fake-facilitator.mjs
server/lib/store.mjs
server/test/contract.test.mjs

sha256

ab5cfc51fba8c9ca877108b4b8a384b9eb095643eb5fcadd6e982d7c172fc477

Guarantees

Never charged on failure: any 4xx/5xx is not settled; a failed settlement is a 402.
The body is released only after settlement succeeds.
Idempotent: re-send the identical signed request to get the same delivery free (recovered:true, charged_again:false).

Source: free /info · pricing.md

Quote

Amount: $999.00 · 999000000 atomic
Network: eip155:8453 · Base
Asset: USD Coin 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
payTo: 0x6264191D6dD5427435B5E829077842e130Ef1fc8
Scheme: exact · timeout 120 s
Status: ready · snapshot 2026-11-04

Before you sign

Default x402 clients stop at $1. Set your client's per-payment limit (spendControls.maxAmountPerPayment) to at least $999.00 before paying.
Verify the payTo against the live 402 quote, never against explorer history.

Includes

Monthly agent-commerce / x402 market research brief tailored to your product (competitors, facilitators, Bazaar/AgentCash/x402scan demand, pricing)
Priority access to the Avasis live rails on agents.avasis.ai (Solana verdict + complete kit, EVM gas/fee/precheck/receipt/allowance rails, Polymarket kit) with a monthly usage allowance agreed at intake
Rails tuning on request: new route, price, listing or doc change for your use case (scoped at intake, one change batch per month)
Listing + discovery review (llms.txt, openapi x-guidance, .well-known/x402, Bazaar metadata) for your own x402 endpoints
Async support by email (abhay@avasis.ai), reply within 1 business day

Excludes

Custody of funds, trading or financial advice
Smart-contract audits or exploit PoCs
Anything that needs your private keys (we never ask for them)

Guarantees

Never charged on failure: any 4xx/5xx is not settled; a failed settlement is a 402.
Idempotent: identical signed request re-sent = same receipt free.

Source: free /info · pricing.md

Quote

Amount: $2,500.00 · 2500000000 atomic
Network: eip155:8453 · Base
Asset: USD Coin 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
payTo: 0x6264191D6dD5427435B5E829077842e130Ef1fc8
Scheme: exact · timeout 120 s
Status: ready · snapshot 2026-11-04

Before you sign

Default x402 clients stop at $1. Set your client's per-payment limit (spendControls.maxAmountPerPayment) to at least $2,500.00 before paying.
Verify the payTo against the live 402 quote, never against explorer history.

Includes

The scrubbed production x402 starter kit zip, inline in the 200 body (same sha256 as the $49 kit) as the code base
White-label build of the rails you pick at intake (e.g. Solana token verdict/kit, EVM gas/fee/precheck/receipt rails, Polymarket kit, prepaid meter) under your domain, brand and payTo
Deploy hardening (Caddy, systemd, CDP + PayAI facilitator failover, never-charged-on-failure, idempotent receipts) on your infra
Discovery listings for your host: llms.txt, agents.md, openapi x-guidance, .well-known/x402, Bazaar metadata
Handover call + 30 days of email support (abhay@avasis.ai)

Excludes

Hosting fees on your infra
Custody of funds or private keys (you keep your own payTo)
Smart-contract audits or exploit PoCs

Guarantees

Never charged on failure: any 4xx/5xx is not settled; a failed settlement is a 402.
Idempotent: identical signed request re-sent = same receipt free.

Source: free /info · pricing.md

Packs

Trial: $0.05 → $0.06 credit (+20%)
$1 pack: $1.00 → $1.10 credit (+10%)
$5 pack: $5.00 → $6.00 credit (+20%)
$20 pack: $20.00 → $26.00 credit (+30%)

Use the token

Authorization: Bearer <token>
X-Meter-Token: <token>
Balance: https://agents.avasis.ai/v1/meter/balance
Headers: X-Meter-Cost, X-Meter-Balance, X-Meter-Status

Rules

Debited only for 2xx/3xx answers; 4xx/5xx/aborted calls are refunded.
Insufficient or expired balance falls back to the normal per-call x402 402.
Expiry: 30 days after the last top-up. Balance cap: 200.000 USDC.
Rate: 25 req/s per token (burst 50).

Source: /v1/meter · pricing.md

03 / Guarantees

Paid once, delivered once

01
Never charged on failure: any 4xx/5xx is not settled; a failed settlement is a 402.
02
The body is released only after settlement succeeds.
03
Idempotent: re-send the identical signed request to get the same delivery free (recovered:true, charged_again:false).

License

Use, modify and deploy in your own projects (commercial or not); no resale or redistribution as a template, course or starter kit.

Delivery

Inline: zip_base64 in the 200 body
Link: https://agents.avasis.ai/v1/downloads/x402-starter-kit/<token>/x402-paid-api-starter-kit.zip (application/zip, 30 days, 50 downloads)
Status: https://agents.avasis.ai/v1/base/x402-starter-kit/status/<token>

Quote

Price: $49.00 · 49000000 atomic USDC
Network: eip155:8453 (Base)
Asset: USD Coin 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
payTo: 0x6264191D6dD5427435B5E829077842e130Ef1fc8
Scheme: exact · quote timeout 120 s
Pay URL: https://agents.avasis.ai/v1/base/x402-starter-kit (agents: a browser gets the free 402 quote)
Free docs: https://agents.avasis.ai/v1/base/x402-starter-kit/info
Before you sign: client.setSpendControls({ maxAmountPerPayment: "$49" })
Snapshot: 2026-11-04T20:38:29.498Z · prices re-read at every build

Verify the payTo against the live 402 quote before you sign, never against explorer history.

Questions before you buy

Talk to a human, or let your agent buy

Rather pay by invoice or scope first? Email abhay@avasis.ai.

//Agents: agents.md lists every paid route with its exact cap.

Email abhay@avasis.ai Research + Rails Retainer (1 month) $999 White-Label x402 Rails Pack $2,500 Prepaid API credit from $1

x402 Paid-API Starter Kit

One zip, the whole stack

Your agent buys it in one call

x402 Paid-API Starter Kit

Research + Rails Retainer (1 month)

White-Label x402 Rails Pack

Prepaid API credit

Pick an offer

Raise payment limit

Fund your agent

Buy once

Scope it

Raise limit, fund the agent

Buy one month

Scope it

Raise limit, fund the agent

Buy the pack

Pick a rail

Add prepaid credit

Run

Paid once, delivered once

Talk to a human, or let your agent buy