Head to head · Design templates · October 2026 research run
Pixelixe vs Robolly
Robolly scores 48.4 (D) on agent readiness against Pixelixe's 37.3 (F), and leads in 5 of 7 scored categories. Pixelixe leads on schema & documentation and maintenance & community. Both do design templates.
Best programmatic image and design asset APIs for AI agents · All 153 assets comparisons
Which one, for what
Pixelixe F
Best for Template fills and white-label editing for marketing and SaaS teams, with a JSON-to-graphic route for agents.
Ahead on
- Schema & documentation, 66 against 57
- Maintenance & community, 19 against 5
Watch for
Every error is HTTP 400 with a free-text message, including wrong keys and exhausted credits
Robolly D
Best for Template-driven images, PDFs and short videos for marketers and developers who want a hosted editor and simple synchronous calls.
Ahead on
- Reliability, 48 against 15
- Agent ergonomics, 75 against 49
- Security & auth, 47 against 38
- Payments & pricing, 35 against 30
- Transparency & trust, 49 against 41
Watch for
No OpenAPI or other machine-readable contract found
Why the edge
Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.
Reliability Robolly +33
Pixelixe 15
Hosted lines. No status page found on the site or in the docs (0). No readable incident history (5). No rate limit is published; the terms only forbid circumventing them (0). No 429, Retry-After or backoff guidance. Every error, a wrong key and exhausted credits included, is a 400 with a message (0). No SLA found; the terms supply the service as is (0). API v2 is current and not labelled beta (10). 0 + 5 + 0 + 0 + 0 + 10 = 15.
Robolly 48
Hosted lines. The footer links an UptimeRobot status page, but it loads its figures from /api/, which stats.uptimerobot.com's robots.txt disallows, so the page showed no monitors or history (10 of 20 for a page that exists) and no history was read (5). A hard limit of 3 renders a second is published (15). The rate-limit error code and advice to send renders one at a time, and identical renders are cached for 45 days at no cost, which makes a retry safe; there's no Retry-After or backoff interval (8 of 15). No SLA found (0). The API isn't labelled beta (10). 10 + 5 + 15 + 8 + 0 + 10 = 48.
Agent ergonomics Robolly +26
Pixelixe 49
Seven compact MCP tools (25). Document and design-set search filters, with no pagination documented (10 of 20). All errors are 400 with free-text messages, so an agent can't branch on a code (6 of 20). No idempotency keys, and annotations couldn't be read on the closed server. The MCP tools only read and create, with nothing that deletes (5 of 20). Few required fields, but no official SDK (3 of 15). 25 + 10 + 6 + 5 + 3 = 49.
Robolly 75
Nine MCP tools (25). The renders list pages with a cursor, and templates are found by name (14 of 20). Errors carry errorCode and developerMessage with eight documented codes (17 of 20). Identical renders are cached for 45 days, so repeats are free and safe, the MCP server has no delete tool, and annotations couldn't be read on the closed server (12 of 20). Renders return the file synchronously by default, but there's no SDK (7 of 15). 25 + 14 + 17 + 12 + 7 = 75.
Maintenance & community Pixelixe +14
Pixelixe 19
No dated release or API change was found. The newest dated items are the MCP registry entry of 26 March 2026 and the privacy policy of 7 April 2026, more than 180 days before this check (0). No three dated changes since 8 August (0). No changelog. Support by email at inquiries@pixelixe.com, not tested (4 of 15). com.pixelixe/pixelixe-mcp is in the official MCP registry under a domain-verified namespace; there are no official SDKs (15). No public package or repository (0). 0 + 0 + 4 + 15 + 0 = 19.
Robolly 5
No changelog, release notes or dated API change was found. The sitemap marks every docs page as modified on 4 November 2026, which reads as a site rebuild rather than a change, so it isn't counted (0). No dated changes since 8 August (0). Support by email, with chat on higher plans; not tested (5 of 15). Not in the official MCP registry and no SDKs (0). No public package or repository (0). 0 + 0 + 5 + 0 + 0 = 5.
Schema & documentation Pixelixe +9
Pixelixe 66
OpenAPI 3.1 (version 2.0.0) at pixelixe.com/pixelixe-openapi.json, but it covers four endpoints, authentication, document search, graphic automation and photo effects, and leaves out the JSON-to-graphic and image processing APIs (18 of 25). llms.txt exists but routes readers to marketing pages; the MCP reference is written for LLMs (7 of 10). The MCP reference says what each of the seven tools maps to, that pixelixe_generate_graphic_variant 'is not a free-form layout API', lists common mistakes and how to present outputs (17 of 20). The MCP layer documents canonical field names and refuses legacy aliases; the REST modifications are open structures keyed by element name (10 of 15). Request examples throughout, but errors are one table of message strings all returning 400 (8 of 15). /v2 paths and a deprecated V1, with no changelog (6 of 15). 18 + 7 + 17 + 10 + 8 + 6 = 66.
Robolly 57
No OpenAPI or other machine-readable contract found for the REST API, and the MCP server is closed. The MCP page lists all nine tools and get_template_modifications returns each template's keys, constraints and examples at run time (8 of 25, on that partial evidence). llms.txt indexes the docs (10). The MCP page says what each tool does, which tools change templates or spend credits, and that there is no delete tool (14 of 20). Modification keys follow {element-name}.{modification-key} with constraints from the template rather than a fixed schema (7 of 15). Request examples throughout and an error code table with eight codes (13 of 15). /v1 paths with no changelog (5 of 15). 8 + 10 + 14 + 7 + 13 + 5 = 57.
Security & auth Robolly +9
Pixelixe 38
A bearer API key per account, plus a public key for the embedded editor. The MCP server accepts the key or an OAuth token from studio.pixelixe.com/oauth/mcp with one pixelixe.mcp scope. No key scopes, rotation or revocation documented (18 of 30). No read-only mode, though the MCP tools can't delete or change account settings (10 of 20). Tools return the account's own templates and renders (10 of 15). No audit log or per-call record documented (0). No security.txt, disclosure policy, bug bounty or certification found (0). 18 + 10 + 10 + 0 + 0 = 38.
Robolly 47
Bearer API key, signed render links, and MCP OAuth with one robolly:mcp scope limited to the organisation the user approves. Connections are listed and revoked under Connected AI Tools, and the API key is never shared with an OAuth client. No key scopes or rotation documented (22 of 30). The MCP server can create and update templates but not delete them; there's no read-only mode (10 of 20). Tools return the user's templates and public gallery designs (10 of 15). A renders list and the connected-tools view give some visibility, with no audit log documented (5 of 15). No security.txt (the path returns the site's HTML shell), disclosure policy, bug bounty or certification (0). 22 + 10 + 10 + 5 + 0 = 47.
Transparency & trust Robolly +8
Pixelixe 41
Closed service under terms of 19 March 2026 that choose French law but name no company (12 of 30). The privacy policy of 7 April 2026 keeps account data while the account is active and 'as long as reasonably necessary' after, with no periods, and says nothing about AI processing or training (10 of 30). V1 is marked deprecated in the docs with no dates or notice period (5 of 20). Processors are described only by category, with Google Analytics named, and data processed in France, the EEA and other vendor countries (5 of 20). 12 + 10 + 5 + 5 = 32.
Robolly 49
Closed service under terms effective 8 April 2026 from Avantis Innovations LLC in Wyoming. The terms can change without notice (15). The privacy policy of the same date covers Google sign-in and Sheets data, says spreadsheet rows aren't kept beyond a render and account data is deleted with the account, and otherwise names no periods (10 of 30). No deprecation policy or notices (0). Hosting is described only as third-party vendors, with no processors or locations named, while the footer says Made in EU (2 of 20). 15 + 10 + 0 + 2 = 27.
Score by category
| Category | Weight this run | Pixelixe | Robolly | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 15 | 48 | Robolly +33 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 66 | 57 | Pixelixe +9 |
| Agent ergonomics | 13%16.2 | 49 | 75 | Robolly +26 |
| Security & auth | 14%17.5 | 38 | 47 | Robolly +9 |
| Payments & pricing | 10%12.5 | 30 | 35 | Robolly +5 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 19 | 5 | Pixelixe +14 |
| Transparency & trust | 7%8.8 | 41 | 49 | Robolly +8 |
| Negative events | ≤15 | 0 | 0 | |
| Total | F 37.3/100 | D 48.4/100 |
Facts side by side
| Fact | Pixelixe | Robolly |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | Pixelixe | Avantis Innovations LLC (Robolly) |
| Hosted endpoint | https://studio.pixelixe.com/api | https://api.robolly.com/v1 |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Closed service under the Pixelixe terms of service (last modified 19 March 2026) | Closed service under the Robolly terms of use (effective 8 April 2026) |
| Tools exposed | 7 | 9 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | com.pixelixe/pixelixe-mcp | not listed |
| Last release | 2026-03-26 | none |
| Terms last updated | 2026-03-19 | 2026-04-08 |
| Privacy policy last updated | 2026-04-07 | 2026-04-08 |
| 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 | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
Verdicts
Pixelixe
Pixelixe's seven MCP tools and their LLM-oriented reference make template fills and JSON-to-graphic creation simple to call, with an OpenAPI file for the core endpoints. Every error comes back as a 400 with a message, there are no published rate limits, status page or changelog, and API access starts at $59 a month.
Robolly
Robolly's nine MCP tools, synchronous renders, typed error codes and free cached re-renders keep template rendering cheap and predictable for an agent, and OAuth connections can be revoked per client. There is no OpenAPI file, changelog or dated release, and API access starts at $39 a month after a 7-day trial.
Before you call either
Pixelixe
- Call
pixelixe_search_documentsfirst to find thedocument_uidof the template to reuse - Use
pixelixe_generate_graphic_variantto fill an existing template; it can't change the layout - Read the error
messagetext, since every failure is a 400 - Stop and tell the user on 'Not enough Credits'; retrying won't help
- For a batch, use
pixelixe_create_multiple_imagesand summarise counts rather than inlining every image
Robolly
- Call
get_template_modificationsbeforerenderto learn the keys a template accepts - Send renders one at a time; the API refuses more than 3 a second with
rate-limit - Repeat an identical render freely; it is cached for 45 days and costs nothing
- Poll
get_renderafterrender_video, since video renders are queued - Stop on
render-limit-exhaustedand tell the user the monthly credits are spent
Questions
Which is better for AI agents, Pixelixe or Robolly?
Robolly scores 48.4 (D) on agent readiness against Pixelixe's 37.3 (F), and leads in 5 of 7 scored categories. Pixelixe leads on schema & documentation and maintenance & community.
Do Pixelixe and Robolly need an API key?
Both take an API key or an OAuth sign-in.
Can an agent call Pixelixe and Robolly without installing anything?
Yes. Pixelixe has a hosted endpoint at https://studio.pixelixe.com/api and Robolly at https://api.robolly.com/v1.
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Machine-readable
- This page as Markdown
/compare/pixelixe-vs-robolly.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/pixelixe.json·/api/v1/tools/robolly.json - From a terminal
anchor compare pixelixe robolly(the CLI) - Over MCP
compare_tools {"a": "pixelixe", "b": "robolly"}at/mcp, no key