Priors vs ArcID
Priors is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑20.
Priors is a plugin bundle for AI coding tools published by priors-agents. No marketplace we read lists it any more. ArcID is an MCP server published by arcusid. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-29. A plugin in this pair is no longer listed on any marketplace we read, so search engines are asked not to index the page.
Where each is published
| Marketplace |  ArcID | |
|---|---|---|
| Community marketplace priors-agents/priors | Removed on 2026-10-20 Version: 0.9.3 Forks (GitHub): 6 Stars (GitHub): 5 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.2.0 Downloads/month (npm): 228 Downloads/week (npm): 38 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Priorsno longer listed · | ArcID |
|---|---|---|
| Marketplaces that list it (differs) | 0 | 1 |
| Stars (GitHub) (differs) | 5 | 0 |
| Forks (GitHub) (differs) | 6 | 0 |
| Last release | Not published | Not published |
| Where it runs (differs) | Remote server (mcp.priors.trade/mcp) | Remote server (mcp.arcusid.com/mcp) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 1, secrets among them: 0 |
| Parts of the bundle (differs) | 1 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/priors-agents/priors | github.com/arcusid/arcid-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-14 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 6 days ago |
Lines where the two differ have a tinted background and bold values. No value is marked better or worse: a plugin no marketplace lists any more is shown with its last known data, which we do not rank against current figures.
What to use instead of Priors
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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Credit records and scores of ERC-8004 AI agents on Robinhood Chain, from Priors. No key needed.
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makememoneynomistakes.ai: ERC-8004 agent reputation and fraud checks
Check before you hire or pay an ERC-8004 agent on Base: track record, reputation and fraud flags.
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140+ pay-per-call agent tools: verifiable strategy track records, token verdicts, web, crypto data.
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Credit scores for AI agents. Underwrite an unknown counterparty before extending credit.
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49 paid x402 tools for agents: sanctions, SEC filings, perps, yields, DeFi, gas, odds, audits.
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Ledger of AI-agent money on Base: ranked agents, payments, detections, free checks before you pay
What each says it does
Priors
Give an ERC-8004 agent a credit history on Priors (Robinhood Chain), and check any agent's record and score: the Priors skill, plus the hosted read-only Priors MCP server (no key, no transaction)
ArcID
Look up AI agents on Arc: ERC-8004 identity, feedback, validations and USDC-backed trust scores.
How to run each
Priors
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
ArcID As a remote MCP server
claude mcp add --transport http arcid-mcp https://mcp.arcusid.com/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only ArcID has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of Priors publish no settings it asks for, so we do not compare settings.
What it can do: Priors · What it can do: ArcID · Compare two other plugins
Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.