Which alternatives to Visa Trusted Agent Protocol (TAP) are open source?

6 of 10: x402, Flaunch, Hyperliquid Python SDK, Agentic Commerce Protocol (ACP), ERC-8004: Trustless Agents, Agent Payments Protocol (AP2). Openness is read from each project's own published license or repository.

Which alternatives run on the same chains as Visa Trusted Agent Protocol (TAP)?

1: Agentic Commerce Protocol (ACP). Chain support is self-declared by each project unless a named check says otherwise on its listing.

Has Sato Hub verified any of these?

Sato Hub reproduced the documented install for 6 of them: World AgentKit, x402, Alchemy, Flaunch, Hyperliquid Python SDK, Enso. Reproducing an install means the documented setup was actually run — it is not a security review, and Sato Hub holds no security assessment of any of these.

How is this list of alternatives built?

It is a rule over live records, not a hand-written list: every listing in Visa Trusted Agent Protocol (TAP)'s own category that carries a Sato Score, ordered by the same evidence the rest of the site ranks on — Sato Score tier, whether an endpoint answered our probe, whether a deploy spec exists and was reproduced, a sustained observed record, and chain overlap with Visa Trusted Agent Protocol (TAP). It is rebuilt from the records, so it changes when they do.

Ranked alternatives · updated 2026-09-13

What are the alternatives to Visa Trusted Agent Protocol (TAP)?

Sato Hub lists 10 alternatives to Visa Trusted Agent Protocol (TAP) in the API / SDK category as of 2026-09-13; highest Sato Scores: World AgentKit (86), x402 (86), Alchemy (83); 6 open source; 6 with an install Sato Hub reproduced. Ordered by how open, active and verifiable each one is — not by quality, and no winner is declared.

Rule · Every listing in Visa Trusted Agent Protocol (TAP)’s own category (API / SDK) that carries a Sato Score, ordered by score tier, observed liveness, deploy-spec and reproduced-install evidence, and chain overlap with Visa Trusted Agent Protocol (TAP).

This page ranks peers on how open, active and verifiable each one is — the same evidence Sato Hub publishes everywhere else. It is not a quality, safety or performance ranking, it declares no winner, and it cannot tell you which of these fits your codebase. A Sato Score is not an audit: none of these has been security-reviewed by Sato Hub, and a listing with no earned verification is self-reported.

#	Alternative	Sato Score	Liveness	Chains	Differs on
1	World AgentKit✓ reviewed SDK from World (Tools for Humanity) that lets AI agents present a zero-knowledge proof a verified human authorized them, combined with x402 payments. npm install @worldcoin/agentkit install reproduced by Sato Hub	High	Active · 17d ago	Base	Also on Base; partly open source; deploys as npm.
2	x402✓ reproduced Open payment protocol enabling agents and apps to pay for APIs over HTTP using stablecoins. npm install x402-fetch install reproduced by Sato Hub	High	Active · 10d ago	Base, Ethereum, Multichain, Solana	Also on Base, Ethereum, Multichain, Solana; open source; deploys as npm, pip.
3	Alchemy✓ reproduced A blockchain developer platform providing node infrastructure plus NFT, Token, and Transfers APIs and SDKs across many chains. npm install @alchemy/wallet-apis viem install reproduced by Sato Hub	High	Active · 3d ago	Ethereum, Base, Solana, Arbitrum, Optimism, Polygon, Multichain	Also on Ethereum, Base, Solana, Arbitrum and 3 more; partly open source; deploys as API, MCP server.
4	Flaunch✓ reproduced Uniswap-V4-based token launch protocol on Base with a TypeScript SDK and its own MCP server. npm install @flaunch/sdk install reproduced by Sato Hub	High	Active · 6d ago	Base	Also on Base; open source.
5	Hyperliquid Python SDK✓ reviewed The official open-source Python SDK for programmatic trading on the Hyperliquid perpetuals DEX. pip install hyperliquid-python-sdk install reproduced by Sato Hub	High	Quiet · 3mo ago	Arbitrum, Multichain, Hyperliquid	Also on Arbitrum, Multichain, Hyperliquid; open source; deploys as Self-hosted, pip.
6	Enso✓ reproduced An intent-based onchain execution engine and API that lets developers and agents bundle multi-step DeFi actions into a single transaction. npm install @ensofinance/sdk install reproduced by Sato Hub	High	Recent · 2mo ago	Ethereum, Base, Arbitrum, Optimism, Polygon, Multichain	Also on Ethereum, Base, Arbitrum, Optimism and 2 more; partly open source; deploys as npm, API.
7	Agentic Commerce Protocol (ACP)✓ reviewed Open standard maintained by OpenAI and Stripe for connecting buyers, their AI agents, and businesses to complete purchases. no deploy spec on record	High	Quiet · 3mo ago	—	Open source; deploys as API, MCP server.
8	ERC-8004: Trustless Agents✓ reviewed Ethereum standard providing on-chain identity, reputation, and validation registries for AI agents. npm install install as documented by the project — not reproduced	High	Active · 29d ago	Ethereum, Multichain, Base, Arbitrum	Also on Ethereum, Multichain, Base, Arbitrum; open source.
9	Agent Payments Protocol (AP2)✓ reviewed Open protocol from Google for secure agent-led payments across traditional and crypto rails, with a crypto-native x402 extension built with Coinbase, Ethereum Foundation, and MetaMask. uv pip install git+https://github.com/google-agentic-commerce/AP2.git@main install as documented by the project — not reproduced	High	Quiet · 5mo ago	Ethereum, Base, Multichain	Also on Ethereum, Base, Multichain; open source; deploys as pip, Self-hosted.
10	QuickNode RPC infrastructure provider offering endpoints, Streams, and indexing tools across many blockchain networks. npx -y @quicknode/mcp install as documented by the project — not reproduced	High	Quiet · 3mo ago	Ethereum, Base, Solana, Arbitrum, Optimism, Polygon, BNB Chain, Multichain, Bitcoin, Hyperliquid, MegaETH, Monad	Also on Ethereum, Base, Solana, Arbitrum and 8 more; partly open source; deploys as Hosted, API.

“Differs on” is derived from the records — type, chains, openness and deployment — and states a difference, never a preference. ✓ marks an earned state named as what was checked; none of them is a safety claim.

Questions about alternatives to Visa Trusted Agent Protocol (TAP)

What are the alternatives to Visa Trusted Agent Protocol (TAP)?: World AgentKit, x402, Alchemy, Flaunch, Hyperliquid Python SDK, Enso, Agentic Commerce Protocol (ACP), ERC-8004: Trustless Agents, Agent Payments Protocol (AP2), QuickNode are listed in the same category as Visa Trusted Agent Protocol (TAP) (API / SDK), as of 2026-09-13. The order is Sato Score and observed evidence, not a quality judgment.
Which alternatives to Visa Trusted Agent Protocol (TAP) are open source?: 6 of 10: x402, Flaunch, Hyperliquid Python SDK, Agentic Commerce Protocol (ACP), ERC-8004: Trustless Agents, Agent Payments Protocol (AP2). Openness is read from each project's own published license or repository.
Which alternatives run on the same chains as Visa Trusted Agent Protocol (TAP)?: 1: Agentic Commerce Protocol (ACP). Chain support is self-declared by each project unless a named check says otherwise on its listing.
Has Sato Hub verified any of these?: Sato Hub reproduced the documented install for 6 of them: World AgentKit, x402, Alchemy, Flaunch, Hyperliquid Python SDK, Enso. Reproducing an install means the documented setup was actually run — it is not a security review, and Sato Hub holds no security assessment of any of these.
How is this list of alternatives built?: It is a rule over live records, not a hand-written list: every listing in Visa Trusted Agent Protocol (TAP)'s own category that carries a Sato Score, ordered by the same evidence the rest of the site ranks on — Sato Score tier, whether an endpoint answered our probe, whether a deploy spec exists and was reproduced, a sustained observed record, and chain overlap with Visa Trusted Agent Protocol (TAP). It is rebuilt from the records, so it changes when they do.

Sources — the projects' own repositories and docs

Keep going

Visa Trusted Agent Protocol (TAP) on Sato Hub →Every API / SDK listing →How the Sato Score works →

Cite this page

Sato Hub. "Alternatives to Visa Trusted Agent Protocol (TAP)." Sato Hub, updated 2026-09-13, accessed 2026-09-14. https://satohub.ai/alternatives/visa-trusted-agent-protocol-tap

Data last refreshed 2026-09-13; this page is rebuilt daily. Citations carry the date so a reader can tell which snapshot a claim came from. Catalog data is licensed CC-BY-4.0.