Rank 7unstatedx402

thirdweb x402

Hosted x402 facilitator and agent payment endpoint across EVM chains

Rank: 7 of 14
Composite score: 8.1 / 10
Schemes: x402
Role: Pays 402 challenges; Charges with 402
Kind: facilitator
Maturity: unstated
Protocol / rail: x402 on 170+ EVM chains
Assets: USDC, ERC-20 (permit / EIP-3009)
Networks: evm, base
Custody model: Settles through thirdweb-managed server wallets
Node management: Not required
MCP native: No
License: Apache-2.0
Last verified: 2026-10-15

Overview

thirdweb offers x402 on both sides. Server-side, facilitator() and settlePayment() from thirdweb/x402 verify and settle payments through thirdweb's hosted facilitator — or a custom one — from a server wallet, across 170+ EVM chains and any ERC-20 that supports permit or EIP-3009 signatures, with gasless submission via EIP-7702. Client-side, wrapFetchWithPayment handles the 402 round-trip, and a hosted endpoint, POST /v1/payments/x402/fetch, lets an agent pay a target URL from a project wallet. The current docs read PAYMENT-SIGNATURE first and fall back to X-PAYMENT.

Key advantages

A hosted facilitator that verifies and settles payments, or bring your own
170+ EVM chains; any ERC-20 that supports ERC-2612 permit or EIP-3009
Gasless submission via EIP-7702
A hosted POST /v1/payments/x402/fetch endpoint lets agents pay from a project wallet

Trade-offs

Settlement runs through thirdweb server wallets and a project secret key
Older examples use the v1 X-PAYMENT header — follow the live docs
Pricing lives on thirdweb's pricing page, not in the docs

Evaluation matrix

Custody & Sovereignty6.5
Self-custodial with exit guarantees vs. centralized/custodial risk. A 10 means the holder keeps their own keys and can unilaterally exit to the base chain; a custodial platform scores around 4.
Operational Friction9.0
Infrastructure burden. Zero nodes, channels or liquidity to manage scores a 10; running and maintaining your own Lightning node scores around 4–5.
Agent Native Support7.5
Out-of-the-box MCP server integration, typed tool calls and LLM-friendly setup. A first-party MCP server scores 9–10; a library or CLI an agent can drive scores 6–8.
Payment Rails & Assets9.0
Breadth of settlement rails and assets: Lightning for true micropayments, stablecoins for a stable unit of account, cards for mainstream reach. A single asset on a single network scores around 7.
Settlement Speed & Fees8.0
Instant sub-second settlement with near-zero overhead scores a 10. Block-bound settlement scores around 8; card-network settlement and fees score lower.
Developer DX8.5
SDK quality, documentation, maintenance and copy-paste integration speed. Alpha-stage API churn, stale releases or inconsistent docs lower the score.

Why these scores. Custody 6.5: settles from platform-managed server wallets. Friction 9: hosted facilitator. Agent 7.5: a hosted pay-through endpoint for agents; no MCP server. Rails 9: 170+ EVM chains and broad token support. Settlement 8: EVM block times. DX 8.5: documented server and client helpers.

Integration

Install

npm install thirdweb

Server-side imports

import { facilitator, settlePayment } from "thirdweb/x402";

Best for

Teams that want broad EVM chain and token coverage for x402 with a hosted facilitator.

Sources

Every claim on this page was checked against these sources on 2026-10-15. Maturity “unstated” means: the vendor does not state a maturity level.

Machine-readable

fetch this entry as JSON

curl "https://402mcp.org/api/v1/solutions?id=thirdweb-x402&view=full"

or as Markdown

curl -H 'Accept: text/markdown' https://402mcp.org/solutions/thirdweb-x402