# Crossmint API + Docs MCP vs Orb

> Crossmint API + Docs MCP and Orb score within a point of each other for card payments, 67.1 and 66.5 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/crossmint-vs-orb
- Markdown: https://www.anchorterminal.com/compare/crossmint-vs-orb.md (~2,400 tokens)
- Slim: https://www.anchorterminal.com/compare/crossmint-vs-orb.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/crossmint-vs-orb.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

Crossmint API + Docs MCP and Orb score within a point of each other on agent readiness, 67.1 (B) and 66.5 (B). Orb leads on reliability, schema & documentation and agent ergonomics. Both do card payments.

- Crossmint API + Docs MCP: grade B, 67.1/100, rank #260 of 950. Markdown https://www.anchorterminal.com/tools/crossmint.md · JSON https://www.anchorterminal.com/api/v1/tools/crossmint.json
- Orb: grade B, 66.5/100, rank #289 of 950. Markdown https://www.anchorterminal.com/tools/orb.md · JSON https://www.anchorterminal.com/api/v1/tools/orb.json
- Best payment and monetisation platforms for AI agents: https://www.anchorterminal.com/best/payment-platforms/index.md
- All 76 platforms comparisons: https://www.anchorterminal.com/compare/payment-platforms/index.md

## Which one, for what

### Crossmint API + Docs MCP (B)

Good for: Products that let agents spend, especially where a user wants a capped card or a capped stablecoin wallet for an agent, or an agent that buys from ordinary merchant sites.

Ahead on:
- Security & auth, 73 against 55
- Payments & pricing, 50 against 5
- Transparency & trust, 80 against 65

Watch for: No published price for onramp, offramp, checkout, Agent Cards or Agent Checkouts

### Orb (B)

Good for: A software or AI company that bills on usage and needs event metering, plan versioning, prepaid credits, invoicing and revenue reporting behind one API, with Stripe or Adyen collecting the money.

Ahead on:
- Reliability, 77 against 53
- Schema & documentation, 88 against 71
- Agent ergonomics, 84 against 71

Watch for: All three plans (Core, Advanced, Enterprise) show custom pricing only, and the pricing page sends new customers to sales


## Score by category

| Category | Weight | Crossmint API + Docs MCP | Orb | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 53 | 77 | Orb +24 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 71 | 88 | Orb +17 |
| Agent ergonomics | 13% (16.2 this run) | 71 | 84 | Orb +13 |
| Security & auth | 14% (17.5 this run) | 73 | 55 | Crossmint API + Docs MCP +18 |
| Payments & pricing | 10% (12.5 this run) | 50 | 5 | Crossmint API + Docs MCP +45 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 82 | Crossmint API + Docs MCP +3 |
| Transparency & trust | 7% (8.8 this run) | 80 | 65 | Crossmint API + Docs MCP +15 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **67.1 · B** | **66.5 · B** | |

## Facts side by side

| Fact | Crossmint API + Docs MCP | Orb |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Crossmint | Orb, Inc. |
| Hosted endpoint | `https://www.crossmint.com/api` | `https://api.withorb.com/v1` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Paid |
| x402 | payer tooling only | no |
| Licence | Apache-2.0 | Proprietary service under Orb's Platform Terms and Conditions. The SDKs on GitHub are Apache-2.0 |
| Tools exposed | 1 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-01 | 2026-10-09 |
| Terms last updated | 2026-07-01 | 2024-11-13 |
| Privacy policy last updated | 2026-09-21 | 2025-05-07 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 52 stars, 40k npm/wk | 5 stars, 185k npm/wk |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**Crossmint API + Docs MCP.** Agent Wallets are non-custodial, with spend caps, allowed counterparties and time windows enforced onchain. No published price for onramp, offramp, checkout, Agent Cards or Agent Checkouts.

**Orb.** Orb suits a company that bills on usage and wants one API for events, plans, credits and invoices. It publishes an OpenAPI 3.1 file, numeric rate limits, idempotency keys and a dry-run header. Every plan is priced on request and access starts with sales. No scope list for API keys or public sub-processor list was found.

## Before you call either

### Crossmint API + Docs MCP

1. Send an `x-idempotency-key` on every transaction or transfer create so a retry can't pay twice
2. Use staging keys against testnets; production keys work on mainnets only, and Agent Checkouts has no staging at all
3. On 429, wait and retry. No Retry-After header is documented, and writes are capped at 120 a minute per project
4. Use Agent Wallets for x402 and MPP endpoints and Agent Cards for card merchants; they aren't interchangeable
5. Append `.md` to any docs URL for a Markdown copy

### Orb

1. Call `https://api.withorb.com/v1` with `Authorization: Bearer <key>`. A person creates the key in the Orb web app under organisation settings, in test mode or live mode
2. Send an `Idempotency-Key` of at most 64 characters on every POST and PATCH. A 409 means the first request is still running or the body changed
3. Add `Dry-Run: True` to check a write first, and confirm `Orb-Dry-Run: true` in the response. Ingest, amend and deprecate event calls ignore it and run for real
4. Do not send `Idempotency-Key` with `Dry-Run`. Orb returns a validation error
5. Page with `limit` (default 20, maximum 100) and pass `next_cursor` back as `cursor` while `has_more` is true
6. Back off exponentially on 429. Test mode allows 5 writes a second and 2,000 ingested events a minute

## Questions

### Which is better for AI agents, Crossmint API + Docs MCP or Orb?

Crossmint API + Docs MCP and Orb score within a point of each other on agent readiness, 67.1 (B) and 66.5 (B). Orb leads on reliability, schema & documentation and agent ergonomics.

### Do Crossmint API + Docs MCP and Orb need an API key?

Both need an API key.

### Can an agent call Crossmint API + Docs MCP and Orb without installing anything?

Yes. Crossmint API + Docs MCP has a hosted endpoint at https://www.crossmint.com/api and Orb at https://api.withorb.com/v1.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/crossmint-vs-orb.json, and with the fewest tokens: https://www.anchorterminal.com/compare/crossmint-vs-orb.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "crossmint", "b": "orb"}`. From a terminal: `anchor compare crossmint orb`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/crossmint.json and https://www.anchorterminal.com/api/v1/tools/orb.json

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